Long-Term Debt and Interest Expense - Schedule Of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Debt Disclosure [Abstract]
Cash payments for interest			$ 38,459	$ 49,628
Commitment and other fees paid			2,280	1,818
Amortization of debt issuance costs and discount or premium on notes			5,876	2,637
Change in accrued interest			20,503	(3,076)
Other			70	(62)
Total interest expense	$ 23,953	$ 17,242	$ 67,188	$ 50,945