Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Total Interest Expense (Details)

v3.8.0.1
Long-Term Debt - Total Interest Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Long-term Debt, Unclassified [Abstract]      
Cash paid for interest $ 101,958 $ 68,966 $ 59,736
Change in accrued interest 10,699 1,768 4,011
Capitalized interest (9,470) (9,148) (13,580)
Amortization of loan costs 5,011 3,660 3,219
Amortization of note discount and premium 0 (1,716) (2,165)
Total interest expense $ 108,198 $ 63,530 $ 51,221