| Investments Accounted For By The Equity Method | 
Investments accounted for by the equity method consist of the following as of June 30, 2016 and December 31, 2015:
 
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   | 
   | 
   | 
Carrying value  | 
   | 
 Loss (income) from equity method investments 
  
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   | 
Approximate ownership %  | 
   | 
June 30, 2016  | 
   | 
December 31, 2015  | 
   | 
Three months ended June 30,  | 
   | 
Six months ended June 30,  | 
 
   | 
   | 
   | 
   | 
2016  | 
   | 
2015  | 
   | 
2016  | 
   | 
2015  | 
 
   | 
   | 
   | 
(In thousands)  | 
 
Investment in Tatex Thailand II, LLC  | 
23.5  | 
%  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
(159  | 
)  | 
   | 
$  | 
—  | 
 
  | 
 
Investment in Tatex Thailand III, LLC  | 
17.9  | 
%  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
189  | 
 
  | 
   | 
—  | 
 
  | 
   | 
189  | 
 
  | 
 
Investment in Grizzly Oil Sands ULC  | 
24.9999  | 
%  | 
   | 
49,556  | 
 
  | 
   | 
50,645  | 
 
  | 
   | 
763  | 
 
  | 
   | 
8,494  | 
 
  | 
   | 
24,448  | 
 
  | 
   | 
12,636  | 
 
  | 
 
Investment in Timber Wolf Terminals LLC  | 
50.0  | 
%  | 
   | 
996  | 
 
  | 
   | 
999  | 
 
  | 
   | 
1  | 
 
  | 
   | 
7  | 
 
  | 
   | 
4  | 
 
  | 
   | 
13  | 
 
  | 
 
Investment in Windsor Midstream LLC  | 
22.5  | 
%  | 
   | 
26,147  | 
 
  | 
   | 
27,955  | 
 
  | 
   | 
(2,881  | 
)  | 
   | 
881  | 
 
  | 
   | 
(3,048  | 
)  | 
   | 
(17,906  | 
)  | 
 
Investment in Stingray Cementing LLC  | 
50.0  | 
%  | 
   | 
2,359  | 
 
  | 
   | 
2,487  | 
 
  | 
   | 
78  | 
 
  | 
   | 
105  | 
 
  | 
   | 
108  | 
 
  | 
   | 
172  | 
 
  | 
 
Investment in Blackhawk Midstream LLC  | 
48.5  | 
%  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
(7,217  | 
)  | 
 
Investment in Stingray Energy Services LLC  | 
50.0  | 
%  | 
   | 
4,981  | 
 
  | 
   | 
5,908  | 
 
  | 
   | 
139  | 
 
  | 
   | 
311  | 
 
  | 
   | 
641  | 
 
  | 
   | 
321  | 
 
  | 
 
Investment in Sturgeon Acquisitions LLC  | 
25.0  | 
%  | 
   | 
22,258  | 
 
  | 
   | 
22,769  | 
 
  | 
   | 
134  | 
 
  | 
   | 
(491  | 
)  | 
   | 
511  | 
 
  | 
   | 
(1,059  | 
)  | 
 
Investment in Mammoth Energy Partners LP  | 
30.5  | 
%  | 
   | 
121,309  | 
 
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   | 
131,630  | 
 
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   | 
2,543  | 
 
  | 
   | 
5,624  | 
 
  | 
   | 
9,009  | 
 
  | 
   | 
7,996  | 
 
  | 
 
Investment in Strike Force Midstream LLC  | 
25.0  | 
%  | 
   | 
25,441  | 
 
  | 
   | 
—  | 
 
  | 
   | 
59  | 
 
  | 
   | 
—  | 
 
  | 
   | 
59  | 
 
  | 
   | 
—  | 
 
  | 
 
   | 
   | 
   | 
$  | 
253,047  | 
 
  | 
 
  | 
$  | 
242,393  | 
 
  | 
 
  | 
$  | 
836  | 
 
  | 
   | 
$  | 
15,120  | 
 
  | 
   | 
$  | 
31,573  | 
 
  | 
   | 
$  | 
(4,855  | 
)  | 
 
  
 
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| Equity Method Investment Balance Sheet Summary | 
The tables below summarize financial information for the Company's equity investments as of June 30, 2016 and December 31, 2015.
 
Summarized balance sheet information:
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   | 
June 30, 2016  | 
   | 
December 31, 2015  | 
 
   | 
   | 
 
   | 
(In thousands)  | 
 
Current assets  | 
$  | 
105,614  | 
 
  | 
   | 
$  | 
105,537  | 
 
  | 
 
Noncurrent assets  | 
$  | 
1,330,877  | 
 
  | 
   | 
$  | 
1,293,925  | 
 
  | 
 
Current liabilities  | 
$  | 
41,238  | 
 
  | 
   | 
$  | 
56,559  | 
 
  | 
 
Noncurrent liabilities  | 
$  | 
146,642  | 
 
  | 
   | 
$  | 
155,995  | 
 
  | 
 
  
 
 
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| Equity Method Investment Income Statement Summary | 
Summarized results of operations:    
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Three months ended June 30,  | 
   | 
Six months ended June 30,  | 
 
   | 
2016  | 
   | 
2015  | 
   | 
2016  | 
   | 
2015  | 
 
   | 
(In thousands)  | 
 
Gross revenue  | 
$  | 
86,732  | 
 
  | 
   | 
$  | 
130,134  | 
 
  | 
   | 
$  | 
130,039  | 
 
  | 
   | 
$  | 
263,690  | 
 
  | 
 
Net (loss) income  | 
$  | 
(560  | 
)  | 
   | 
$  | 
(45,246  | 
)  | 
   | 
$  | 
(25,868  | 
)  | 
   | 
$  | 
45,422  | 
 
  | 
 
  
  
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