Long-Term Debt and Interest Expense - Schedule Of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Debt Disclosure [Abstract]
Cash payments for interest			$ 32,560	$ 30,892
Commitment and other fees paid			1,272	1,336
Amortization of debt issuance costs and discount or premium on notes			4,348	1,398
Change in accrued interest			5,010	174
Other			45	(96)
Total interest expense	$ 22,521	$ 16,841	$ 43,235	$ 33,704