Notes Payable - Deferred Financing Fees and Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Deferred Financing Fees
Payments of deferred financing fees	$ 78	$ 10
Loss on extinguishment of debt	105
Interest incurred and expensed on the notes payable
Loss on derivatives, net	6,402
Amortization of deferred financing fees	555	639
Total interest incurred and expensed on debt and capital lease obligations	20,010	17,326
Notes payable and capital lease obligations
Interest incurred and expensed on the notes payable
Interest expense on debt and capital lease obligations	13,053	16,687
Loss on derivatives, net	6,402
Amortization of deferred financing fees	555	639
Total interest incurred and expensed on debt and capital lease obligations	20,010	$ 17,326
Boston Park Plaza mortgage payable
Deferred Financing Fees
Accelerated amortization of deferred financing fees	100
$100.0 million term loan
Deferred Financing Fees
Payments of deferred financing fees	$ (100)