Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Expected increase to interest expense	$ 2,900		$ 2,900
Derivatives designated as cash flow hedges in accounts payable, accrued expenses and other liabilities [Abstract]
Interest rate swaps	3,366		3,366		$ 2,412
Amount of unrealized gains/(losses) recognized in AOCL on derivatives (effective portion) [Abstract]
Interest rate swaps	269	$ (2,846)	(2,645)	$ (4,250)
Amount of losses reclassified out of AOCL into contractual interest expense (effective portion) [Abstract]
Interest rate swaps	$ 925	$ 944	$ 1,849	$ 1,872