Interest and Debt Expense - Details of Interest and Debt Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest And Debt Expense [Abstract]
Interest expense	$ 35,861	$ 41,304
Amortization of deferred financing costs	1,258	584
Total interest and debt expense	$ 37,119	$ 41,888