Debt - Recorded Expenses with Respect to Long-term Debt (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Debt Disclosure [Abstract]
Interest expense	$ 8,234	$ 8,417
Amortization of debt issuance costs	795	821
Commitment fee	354	359
Accelerated amortization of debt issuance costs	0	738
Accelerated interest expense on repurchase of debt	0	298
Total	$ 9,383	$ 10,633