Notes Payable - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest incurred and expensed
Interest expense on debt and capital lease obligations	$ 11,328	$ 13,053
(Gain) loss on derivatives, net	(657)	6,402
Amortization of deferred financing fees	578	555
Total interest incurred and expensed on debt and capital lease obligations	$ 11,249	$ 20,010