Derivative Financial Instruments (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Expected increase to interest expense	$ 3,000,000
Derivatives designated as cash flow hedges in accounts payable, accrued expenses and other liabilities [Abstract]
Interest rate swaps	4,480,000		2,412,000
Amount of unrealized losses recognized in AOCL on derivatives (effective portion) [Abstract]
Interest rate swaps	(2,914,000)	(1,404,000)
Amount of losses reclassified out of AOCL into contractual interest expense (effective portion) [Abstract]
Interest rate swaps	$ 924,000	$ 928,000