Condensed Consolidating Financial Information (Tables)
   | 
12 Months Ended | 
Dec. 31, 2017  | 
| Condensed Financial Information of Parent Company Only Disclosure [Abstract] | 
 
 | 
| Condensed Consolidating Balance Sheets | 
CONDENSED CONSOLIDATING BALANCE SHEETS 
(Amounts in thousands)
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
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 | 
 | 
 | 
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   | 
December 31, 2017  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
Assets  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Current assets:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Cash and cash equivalents  | 
$  | 
67,908  | 
 
  | 
   | 
$  | 
31,649  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
99,557  | 
 
  | 
 
Restricted cash  | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
 
Accounts receivable - oil and natural gas  | 
128,121  | 
 
  | 
   | 
54,092  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
182,213  | 
 
  | 
 
Accounts receivable - related parties  | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
 
Accounts receivable - intercompany  | 
554,439  | 
 
  | 
   | 
63,374  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(617,813  | 
)  | 
   | 
—  | 
 
  | 
 
Prepaid expenses and other current assets  | 
4,719  | 
 
  | 
   | 
193  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
4,912  | 
 
  | 
 
Short-term derivative instruments  | 
78,847  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
78,847  | 
 
  | 
 
Total current assets  | 
834,034  | 
 
  | 
   | 
149,308  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(617,813  | 
)  | 
   | 
365,529  | 
 
  | 
 
Property and equipment:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Oil and natural gas properties, full-cost accounting  | 
6,562,147  | 
 
  | 
   | 
2,607,738  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(729  | 
)  | 
   | 
9,169,156  | 
 
  | 
 
Other property and equipment  | 
86,711  | 
 
  | 
   | 
43  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
86,754  | 
 
  | 
 
Accumulated depletion, depreciation, amortization and impairment  | 
(4,153,696  | 
)  | 
   | 
(37  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(4,153,733  | 
)  | 
 
Property and equipment, net  | 
2,495,162  | 
 
  | 
   | 
2,607,744  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(729  | 
)  | 
   | 
5,102,177  | 
 
  | 
 
Other assets:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Equity investments and investments in subsidiaries  | 
2,361,575  | 
 
  | 
   | 
77,744  | 
 
  | 
   | 
57,641  | 
 
  | 
   | 
(2,194,848  | 
)  | 
   | 
302,112  | 
 
  | 
 
Long-term derivative instruments  | 
8,685  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
8,685  | 
 
  | 
 
Deferred tax asset  | 
1,208  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,208  | 
 
  | 
 
Inventories  | 
5,816  | 
 
  | 
   | 
2,411  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
8,227  | 
 
  | 
 
Other assets  | 
12,483  | 
 
  | 
   | 
7,331  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
19,814  | 
 
  | 
 
Total other assets  | 
2,389,767  | 
 
  | 
   | 
87,486  | 
 
  | 
   | 
57,641  | 
 
  | 
   | 
(2,194,848  | 
)  | 
   | 
340,046  | 
 
  | 
 
  Total assets  | 
$  | 
5,718,963  | 
 
  | 
   | 
$  | 
2,844,538  | 
 
  | 
   | 
$  | 
57,641  | 
 
  | 
   | 
$  | 
(2,813,390  | 
)  | 
   | 
$  | 
5,807,752  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Liabilities and stockholders' equity  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Current liabilities:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Accounts payable and accrued liabilities  | 
$  | 
416,249  | 
 
  | 
   | 
$  | 
137,361  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
(1  | 
)  | 
   | 
$  | 
553,609  | 
 
  | 
 
Accounts payable - intercompany  | 
63,373  | 
 
  | 
   | 
554,313  | 
 
  | 
   | 
127  | 
 
  | 
   | 
(617,813  | 
)  | 
   | 
—  | 
 
  | 
 
Asset retirement obligation - current  | 
120  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
120  | 
 
  | 
 
Short-term derivative instruments  | 
32,534  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
32,534  | 
 
  | 
 
Current maturities of long-term debt  | 
622  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
622  | 
 
  | 
 
Total current liabilities  | 
512,898  | 
 
  | 
   | 
691,674  | 
 
  | 
   | 
127  | 
 
  | 
   | 
(617,814  | 
)  | 
   | 
586,885  | 
 
  | 
 
Long-term derivative instruments  | 
2,989  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,989  | 
 
  | 
 
Asset retirement obligation - long-term  | 
63,141  | 
 
  | 
   | 
11,839  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
74,980  | 
 
  | 
 
Other non-current liabilities  | 
—  | 
 
  | 
   | 
2,963  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,963  | 
 
  | 
 
Long-term debt, net of current maturities  | 
2,038,321  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,038,321  | 
 
  | 
 
Total liabilities  | 
2,617,349  | 
 
  | 
   | 
706,476  | 
 
  | 
   | 
127  | 
 
  | 
   | 
(617,814  | 
)  | 
   | 
2,706,138  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Stockholders' equity:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Common stock  | 
1,831  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,831  | 
 
  | 
 
Paid-in capital  | 
4,416,250  | 
 
  | 
   | 
1,915,598  | 
 
  | 
   | 
259,307  | 
 
  | 
   | 
(2,174,905  | 
)  | 
   | 
4,416,250  | 
 
  | 
 
Accumulated other comprehensive (loss) income  | 
(40,539  | 
)  | 
   | 
—  | 
 
  | 
   | 
(38,593  | 
)  | 
   | 
38,593  | 
 
  | 
   | 
(40,539  | 
)  | 
 
Retained (deficit) earnings  | 
(1,275,928  | 
)  | 
   | 
222,464  | 
 
  | 
   | 
(163,200  | 
)  | 
   | 
(59,264  | 
)  | 
   | 
(1,275,928  | 
)  | 
 
Total stockholders' equity  | 
3,101,614  | 
 
  | 
   | 
2,138,062  | 
 
  | 
   | 
57,514  | 
 
  | 
   | 
(2,195,576  | 
)  | 
   | 
3,101,614  | 
 
  | 
 
  Total liabilities and stockholders' equity  | 
$  | 
5,718,963  | 
 
  | 
   | 
$  | 
2,844,538  | 
 
  | 
   | 
$  | 
57,641  | 
 
  | 
   | 
$  | 
(2,813,390  | 
)  | 
   | 
$  | 
5,807,752  | 
 
  | 
 
  
 
 
CONDENSED CONSOLIDATING BALANCE SHEETS 
(Amounts in thousands)
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
December 31, 2016  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
Assets  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Current assets  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Cash and cash equivalents  | 
$  | 
1,273,882  | 
 
  | 
   | 
$  | 
1,993  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
1,275,875  | 
 
  | 
 
Restricted cash  | 
185,000  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
$  | 
185,000  | 
 
  | 
 
Accounts receivable - oil and natural gas  | 
137,087  | 
 
  | 
   | 
37,496  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(37,822  | 
)  | 
   | 
136,761  | 
 
  | 
 
Accounts receivable - related parties  | 
16  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
16  | 
 
  | 
 
Accounts receivable - intercompany  | 
449,517  | 
 
  | 
   | 
1,151  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(450,668  | 
)  | 
   | 
—  | 
 
  | 
 
Prepaid expenses and other current assets  | 
3,135  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
3,135  | 
 
  | 
 
Short-term derivative instruments  | 
3,488  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
3,488  | 
 
  | 
 
Total current assets  | 
2,052,125  | 
 
  | 
   | 
40,640  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(488,490  | 
)  | 
   | 
1,604,275  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Property and equipment:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Oil and natural gas properties, full-cost accounting,  | 
5,655,125  | 
 
  | 
   | 
417,524  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(729  | 
)  | 
   | 
6,071,920  | 
 
  | 
 
Other property and equipment  | 
68,943  | 
 
  | 
   | 
43  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
68,986  | 
 
  | 
 
Accumulated depletion, depreciation, amortization and impairment  | 
(3,789,746  | 
)  | 
   | 
(34  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(3,789,780  | 
)  | 
 
Property and equipment, net  | 
1,934,322  | 
 
  | 
   | 
417,533  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(729  | 
)  | 
   | 
2,351,126  | 
 
  | 
 
Other assets:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Equity investments and investments in subsidiaries  | 
236,327  | 
 
  | 
   | 
33,590  | 
 
  | 
   | 
45,213  | 
 
  | 
   | 
(71,210  | 
)  | 
   | 
243,920  | 
 
  | 
 
Long-term derivative instruments  | 
5,696  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
5,696  | 
 
  | 
 
Deferred tax asset  | 
4,692  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
4,692  | 
 
  | 
 
Inventories  | 
3,095  | 
 
  | 
   | 
1,409  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
4,504  | 
 
  | 
 
Other assets  | 
8,932  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
8,932  | 
 
  | 
 
Total other assets  | 
258,742  | 
 
  | 
   | 
34,999  | 
 
  | 
   | 
45,213  | 
 
  | 
   | 
(71,210  | 
)  | 
   | 
267,744  | 
 
  | 
 
  Total assets  | 
$  | 
4,245,189  | 
 
  | 
   | 
$  | 
493,172  | 
 
  | 
   | 
$  | 
45,213  | 
 
  | 
   | 
$  | 
(560,429  | 
)  | 
   | 
$  | 
4,223,145  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Liabilities and stockholders' equity  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Current liabilities:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Accounts payable and accrued liabilities  | 
$  | 
255,966  | 
 
  | 
   | 
$  | 
9,158  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
265,124  | 
 
  | 
 
Accounts payable - intercompany  | 
31,202  | 
 
  | 
   | 
457,163  | 
 
  | 
   | 
126  | 
 
  | 
   | 
(488,491  | 
)  | 
   | 
—  | 
 
  | 
 
Asset retirement obligation - current  | 
195  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
195  | 
 
  | 
 
Short-term derivative instruments  | 
119,219  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
119,219  | 
 
  | 
 
Current maturities of long-term debt  | 
276  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
276  | 
 
  | 
 
Total current liabilities  | 
406,858  | 
 
  | 
   | 
466,321  | 
 
  | 
   | 
126  | 
 
  | 
   | 
(488,491  | 
)  | 
   | 
384,814  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Long-term derivative instruments  | 
26,759  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
26,759  | 
 
  | 
 
Asset retirement obligation - long-term  | 
34,081  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
34,081  | 
 
  | 
 
Long-term debt, net of current maturities  | 
1,593,599  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,593,599  | 
 
  | 
 
Total liabilities  | 
2,061,297  | 
 
  | 
   | 
466,321  | 
 
  | 
   | 
126  | 
 
  | 
   | 
(488,491  | 
)  | 
 
  | 
2,039,253  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Stockholders' equity:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Common stock  | 
1,588  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,588  | 
 
  | 
 
Paid-in capital  | 
3,946,442  | 
 
  | 
   | 
33,822  | 
 
  | 
   | 
257,026  | 
 
  | 
   | 
(290,848  | 
)  | 
   | 
3,946,442  | 
 
  | 
 
Accumulated other comprehensive (loss) income  | 
(53,058  | 
)  | 
   | 
—  | 
 
  | 
   | 
(50,931  | 
)  | 
   | 
50,931  | 
 
  | 
   | 
(53,058  | 
)  | 
 
Retained (deficit) earnings  | 
(1,711,080  | 
)  | 
   | 
(6,971  | 
)  | 
   | 
(161,008  | 
)  | 
   | 
167,979  | 
 
  | 
   | 
(1,711,080  | 
)  | 
 
Total stockholders' equity  | 
2,183,892  | 
 
  | 
   | 
26,851  | 
 
  | 
   | 
45,087  | 
 
  | 
   | 
(71,938  | 
)  | 
   | 
2,183,892  | 
 
  | 
 
  Total liabilities and stockholders' equity  | 
$  | 
4,245,189  | 
 
  | 
   | 
$  | 
493,172  | 
 
  | 
   | 
$  | 
45,213  | 
 
  | 
   | 
$  | 
(560,429  | 
)  | 
   | 
$  | 
4,223,145  | 
 
  | 
 
  
 
 
 | 
| Condensed Consolidating Statements of Operations | 
CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS 
(Amounts in thousands) 
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
Year Ended December 31, 2017  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Total revenues  | 
$  | 
1,010,989  | 
 
  | 
   | 
$  | 
309,314  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
1,320,303  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Costs and expenses:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Lease operating expenses  | 
65,793  | 
 
  | 
   | 
14,453  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
80,246  | 
 
  | 
 
Production taxes  | 
15,100  | 
 
  | 
   | 
6,026  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
21,126  | 
 
  | 
 
Midstream gathering and processing  | 
187,678  | 
 
  | 
   | 
61,317  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
248,995  | 
 
  | 
 
Depreciation, depletion and amortization  | 
364,625  | 
 
  | 
   | 
4  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
364,629  | 
 
  | 
 
General and administrative  | 
55,589  | 
 
  | 
   | 
(2,654  | 
)  | 
   | 
3  | 
 
  | 
   | 
—  | 
 
  | 
   | 
52,938  | 
 
  | 
 
Accretion expense  | 
1,246  | 
 
  | 
   | 
365  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,611  | 
 
  | 
 
Acquisition expense  | 
—  | 
 
  | 
   | 
2,392  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,392  | 
 
  | 
 
   | 
690,031  | 
 
  | 
   | 
81,903  | 
 
  | 
   | 
3  | 
 
  | 
   | 
—  | 
 
  | 
   | 
771,937  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
INCOME (LOSS) FROM OPERATIONS  | 
320,958  | 
 
  | 
   | 
227,411  | 
 
  | 
   | 
(3  | 
)  | 
   | 
—  | 
 
  | 
   | 
548,366  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
OTHER (INCOME) EXPENSE:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Interest expense  | 
112,732  | 
 
  | 
   | 
(4,534  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
108,198  | 
 
  | 
 
Interest income  | 
(988  | 
)  | 
   | 
(21  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(1,009  | 
)  | 
 
(Income) loss from equity method investments and investments in subsidiaries  | 
(226,130  | 
)  | 
   | 
1,955  | 
 
  | 
   | 
2,189  | 
 
  | 
   | 
227,243  | 
 
  | 
   | 
5,257  | 
 
  | 
 
Other (income) expense   | 
(1,617  | 
)  | 
   | 
(324  | 
)  | 
   | 
—  | 
 
  | 
   | 
900  | 
 
  | 
   | 
(1,041  | 
)  | 
 
   | 
(116,003  | 
)  | 
   | 
(2,924  | 
)  | 
   | 
2,189  | 
 
  | 
   | 
228,143  | 
 
  | 
   | 
111,405  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
INCOME (LOSS) BEFORE INCOME TAXES  | 
436,961  | 
 
  | 
   | 
230,335  | 
 
  | 
   | 
(2,192  | 
)  | 
   | 
(228,143  | 
)  | 
   | 
436,961  | 
 
  | 
 
INCOME TAX EXPENSE  | 
1,809  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,809  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
NET INCOME (LOSS)   | 
$  | 
435,152  | 
 
  | 
   | 
$  | 
230,335  | 
 
  | 
   | 
$  | 
(2,192  | 
)  | 
   | 
$  | 
(228,143  | 
)  | 
   | 
$  | 
435,152  | 
 
  | 
 
  
 
CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS 
(Amounts in thousands) 
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
Year Ended December 31, 2016  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Total revenues  | 
$  | 
381,931  | 
 
  | 
   | 
$  | 
3,979  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
385,910  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Costs and expenses:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Lease operating expenses  | 
68,034  | 
 
  | 
   | 
843  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
68,877  | 
 
  | 
 
Production taxes  | 
13,121  | 
 
  | 
   | 
155  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
13,276  | 
 
  | 
 
Midstream gathering and processing  | 
165,400  | 
 
  | 
   | 
572  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
165,972  | 
 
  | 
 
Depreciation, depletion and amortization  | 
245,970  | 
 
  | 
   | 
4  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
245,974  | 
 
  | 
 
Impairment of oil and natural gas properties  | 
715,495  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
715,495  | 
 
  | 
 
General and administrative  | 
43,896  | 
 
  | 
   | 
(490  | 
)  | 
   | 
3  | 
 
  | 
   | 
—  | 
 
  | 
   | 
43,409  | 
 
  | 
 
Accretion expense  | 
1,057  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,057  | 
 
  | 
 
   | 
1,252,973  | 
 
  | 
   | 
1,084  | 
 
  | 
   | 
3  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,254,060  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
(LOSS) INCOME FROM OPERATIONS  | 
(871,042  | 
)  | 
   | 
2,895  | 
 
  | 
   | 
(3  | 
)  | 
   | 
—  | 
 
  | 
   | 
(868,150  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
OTHER (INCOME) EXPENSE:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Interest expense  | 
63,529  | 
 
  | 
   | 
1  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
63,530  | 
 
  | 
 
Interest income  | 
(1,230  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(1,230  | 
)  | 
 
Insurance proceeds  | 
(5,718  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(5,718  | 
)  | 
 
Loss on debt extinguishment  | 
23,776  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
23,776  | 
 
  | 
 
Loss (income) from equity method investments and investments in subsidiaries  | 
31,078  | 
 
  | 
   | 
(89  | 
)  | 
   | 
25,150  | 
 
  | 
   | 
(22,154  | 
)  | 
   | 
33,985  | 
 
  | 
 
Other expense (income)  | 
145  | 
 
  | 
   | 
(16  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
129  | 
 
  | 
 
   | 
111,580  | 
 
  | 
   | 
(104  | 
)  | 
   | 
25,150  | 
 
  | 
   | 
(22,154  | 
)  | 
   | 
114,472  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
(LOSS) INCOME BEFORE INCOME TAXES  | 
(982,622  | 
)  | 
   | 
2,999  | 
 
  | 
   | 
(25,153  | 
)  | 
   | 
22,154  | 
 
  | 
   | 
(982,622  | 
)  | 
 
INCOME TAX BENEFIT  | 
(2,913  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(2,913  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
NET (LOSS) INCOME  | 
$  | 
(979,709  | 
)  | 
   | 
$  | 
2,999  | 
 
  | 
   | 
$  | 
(25,153  | 
)  | 
   | 
$  | 
22,154  | 
 
  | 
   | 
$  | 
(979,709  | 
)  | 
 
  
 
CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS 
(Amounts in thousands) 
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
Year Ended December 31, 2015  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Total revenues  | 
$  | 
707,868  | 
 
  | 
   | 
$  | 
1,122  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
708,990  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Costs and expenses:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Lease operating expenses  | 
68,632  | 
 
  | 
   | 
843  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
69,475  | 
 
  | 
 
Production taxes  | 
14,618  | 
 
  | 
   | 
122  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
14,740  | 
 
  | 
 
Midstream gathering and processing  | 
138,526  | 
 
  | 
   | 
64  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
138,590  | 
 
  | 
 
Depreciation, depletion and amortization  | 
337,689  | 
 
  | 
   | 
5  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
337,694  | 
 
  | 
 
Impairment of oil and natural gas properties  | 
1,440,418  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,440,418  | 
 
  | 
 
General and administrative  | 
41,892  | 
 
  | 
   | 
55  | 
 
  | 
   | 
20  | 
 
  | 
   | 
—  | 
 
  | 
   | 
41,967  | 
 
  | 
 
Accretion expense  | 
820  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
820  | 
 
  | 
 
   | 
2,042,595  | 
 
  | 
   | 
1,089  | 
 
  | 
   | 
20  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,043,704  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
(LOSS) INCOME FROM OPERATIONS  | 
(1,334,727  | 
)  | 
   | 
33  | 
 
  | 
   | 
(20  | 
)  | 
   | 
—  | 
 
  | 
   | 
(1,334,714  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
OTHER (INCOME) EXPENSE:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Interest expense  | 
51,221  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
51,221  | 
 
  | 
 
Interest income  | 
(643  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(643  | 
)  | 
 
Insurance proceeds  | 
(10,015  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(10,015  | 
)  | 
 
Loss (income) from equity method investments and investments in subsidiaries  | 
107,252  | 
 
  | 
   | 
—  | 
 
  | 
   | 
115,544  | 
 
  | 
   | 
(116,703  | 
)  | 
   | 
106,093  | 
 
  | 
 
Other (income) expense  | 
(1,657  | 
)  | 
   | 
(346  | 
)  | 
   | 
—  | 
 
  | 
   | 
1,518  | 
 
  | 
   | 
(485  | 
)  | 
 
   | 
146,158  | 
 
  | 
   | 
(346  | 
)  | 
   | 
115,544  | 
 
  | 
   | 
(115,185  | 
)  | 
   | 
146,171  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
(LOSS) INCOME BEFORE INCOME TAXES  | 
(1,480,885  | 
)  | 
   | 
379  | 
 
  | 
   | 
(115,564  | 
)  | 
   | 
115,185  | 
 
  | 
   | 
(1,480,885  | 
)  | 
 
INCOME TAX BENEFIT  | 
(256,001  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(256,001  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
NET (LOSS) INCOME  | 
$  | 
(1,224,884  | 
)  | 
 
  | 
$  | 
379  | 
 
  | 
 
  | 
$  | 
(115,564  | 
)  | 
 
  | 
$  | 
115,185  | 
 
  | 
 
  | 
$  | 
(1,224,884  | 
)  | 
 
  
 
 | 
| Condensed Consolidating Statements of Comprehensive Income (Loss) | 
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
Year Ended December 31, 2017  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net income (loss)  | 
$  | 
435,152  | 
 
  | 
   | 
$  | 
230,335  | 
 
  | 
   | 
$  | 
(2,192  | 
)  | 
   | 
$  | 
(228,143  | 
)  | 
   | 
$  | 
435,152  | 
 
  | 
 
Foreign currency translation adjustment  | 
12,519  | 
 
  | 
   | 
182  | 
 
  | 
   | 
12,337  | 
 
  | 
   | 
(12,519  | 
)  | 
   | 
12,519  | 
 
  | 
 
Other comprehensive income (loss)  | 
12,519  | 
 
  | 
   | 
182  | 
 
  | 
   | 
12,337  | 
 
  | 
   | 
(12,519  | 
)  | 
   | 
12,519  | 
 
  | 
 
Comprehensive income (loss)  | 
$  | 
447,671  | 
 
  | 
   | 
$  | 
230,517  | 
 
  | 
   | 
$  | 
10,145  | 
 
  | 
   | 
$  | 
(240,662  | 
)  | 
   | 
$  | 
447,671  | 
 
  | 
 
  
  
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
Year Ended December 31, 2016  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
   | 
   | 
 
Net (loss) income  | 
$  | 
(979,709  | 
)  | 
   | 
$  | 
2,999  | 
 
  | 
   | 
$  | 
(25,153  | 
)  | 
   | 
$  | 
22,154  | 
 
  | 
   | 
$  | 
(979,709  | 
)  | 
 
Foreign currency translation adjustment  | 
2,119  | 
 
  | 
   | 
778  | 
 
  | 
   | 
1,341  | 
 
  | 
   | 
(2,119  | 
)  | 
   | 
2,119  | 
 
  | 
 
Other comprehensive income (loss)  | 
2,119  | 
 
  | 
   | 
778  | 
 
  | 
   | 
1,341  | 
 
  | 
   | 
(2,119  | 
)  | 
   | 
2,119  | 
 
  | 
 
Comprehensive (loss) income  | 
$  | 
(977,590  | 
)  | 
   | 
$  | 
3,777  | 
 
  | 
   | 
$  | 
(23,812  | 
)  | 
   | 
$  | 
20,035  | 
 
  | 
   | 
$  | 
(977,590  | 
)  | 
 
  
 
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
Year Ended December 31, 2015  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
   | 
   | 
 
Net (loss) income  | 
$  | 
(1,224,884  | 
)  | 
   | 
$  | 
379  | 
 
  | 
   | 
$  | 
(115,564  | 
)  | 
   | 
$  | 
115,185  | 
 
  | 
   | 
$  | 
(1,224,884  | 
)  | 
 
Foreign currency translation adjustment  | 
(28,502  | 
)  | 
   | 
—  | 
 
  | 
   | 
(28,502  | 
)  | 
   | 
28,502  | 
 
  | 
   | 
$  | 
(28,502  | 
)  | 
 
Other comprehensive (loss) income  | 
(28,502  | 
)  | 
   | 
—  | 
 
  | 
   | 
(28,502  | 
)  | 
   | 
28,502  | 
 
  | 
   | 
(28,502  | 
)  | 
 
Comprehensive (loss) income  | 
$  | 
(1,253,386  | 
)  | 
   | 
$  | 
379  | 
 
  | 
   | 
$  | 
(144,066  | 
)  | 
   | 
$  | 
143,687  | 
 
  | 
   | 
$  | 
(1,253,386  | 
)  | 
 
  
 | 
| Condensed Consolidating Statements of Cash Flows | 
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
Year Ended December 31, 2017  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net cash provided by operating activities  | 
$  | 
392,680  | 
 
  | 
   | 
$  | 
287,209  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
679,889  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net cash (used in) provided by investing activities  | 
(2,031,615  | 
)  | 
   | 
(1,674,690  | 
)  | 
   | 
(2,280  | 
)  | 
   | 
1,419,417  | 
 
  | 
   | 
(2,289,168  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net cash provided by (used in) financing activities  | 
432,961  | 
 
  | 
   | 
1,417,137  | 
 
  | 
   | 
2,280  | 
 
  | 
   | 
(1,419,417  | 
)  | 
   | 
432,961  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net (decrease) increase in cash and cash equivalents  | 
(1,205,974  | 
)  | 
   | 
29,656  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(1,176,318  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Cash and cash equivalents at beginning of period  | 
1,273,882  | 
 
  | 
   | 
1,993  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
1,275,875  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Cash and cash equivalents at end of period  | 
$  | 
67,908  | 
 
  | 
   | 
$  | 
31,649  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
99,557  | 
 
  | 
 
  
  
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
Year Ended December 31, 2016  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net cash provided by (used in) operating activities  | 
$  | 
336,330  | 
 
  | 
   | 
$  | 
(9,486  | 
)  | 
   | 
$  | 
(2  | 
)  | 
   | 
$  | 
11,001  | 
 
  | 
   | 
$  | 
337,843  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net cash (used in) provided by investing activities  | 
(905,582  | 
)  | 
   | 
(22,500  | 
)  | 
   | 
(15,472  | 
)  | 
   | 
37,972  | 
 
  | 
   | 
(905,582  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net cash provided by (used in) financing activities  | 
1,730,640  | 
 
  | 
   | 
33,500  | 
 
  | 
   | 
15,473  | 
 
  | 
   | 
(48,973  | 
)  | 
   | 
1,730,640  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net increase (decrease) in cash and cash equivalents  | 
1,161,388  | 
 
  | 
   | 
1,514  | 
 
  | 
   | 
(1  | 
)  | 
   | 
—  | 
 
  | 
   | 
1,162,901  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Cash and cash equivalents at beginning of period  | 
112,494  | 
 
  | 
   | 
479  | 
 
  | 
   | 
1  | 
 
  | 
   | 
—  | 
 
  | 
   | 
112,974  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Cash and cash equivalents at end of period  | 
$  | 
1,273,882  | 
 
  | 
   | 
$  | 
1,993  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
1,275,875  | 
 
  | 
 
  
 
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
Year Ended December 31, 2015  | 
 
   | 
Parent  | 
   | 
Guarantors  | 
   | 
Non-Guarantor  | 
   | 
Eliminations  | 
   | 
Consolidated  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net cash provided by (used in) operating activities  | 
$  | 
344,018  | 
 
  | 
   | 
$  | 
(21,839  | 
)  | 
   | 
$  | 
(2  | 
)  | 
   | 
$  | 
2  | 
 
  | 
   | 
$  | 
322,179  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net cash (used in) provided by investing activities  | 
(1,595,767  | 
)  | 
   | 
21,514  | 
 
  | 
   | 
(14,472  | 
)  | 
   | 
14,472  | 
 
  | 
   | 
(1,574,253  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net cash provided by (used in) financing activities  | 
1,222,708  | 
 
  | 
   | 
—  | 
 
  | 
   | 
14,474  | 
 
  | 
   | 
(14,474  | 
)  | 
   | 
1,222,708  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Net decrease in cash and cash equivalents  | 
(29,041  | 
)  | 
   | 
(325  | 
)  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(29,366  | 
)  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Cash and cash equivalents at beginning of period  | 
141,535  | 
 
  | 
   | 
804  | 
 
  | 
   | 
1  | 
 
  | 
   | 
—  | 
 
  | 
   | 
142,340  | 
 
  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Cash and cash equivalents at end of period  | 
$  | 
112,494  | 
 
  | 
   | 
$  | 
479  | 
 
  | 
   | 
$  | 
1  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
112,974  | 
 
  | 
 
  
 |