Derivative Instruments (Details 1) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative [Line Items]
Loss (gain) on derivatives, net	$ 49,000	$ 4,872,000	$ 400,000	$ 4,465,000
Interest Rate Swap [Member]
Derivative [Line Items]
Gain (loss) recognized in OCI	(4,000)	(4,000)	(11,000)	(12,000)
Gain (loss) on interest rate swaps recalssified from AOCI into income (effective portion)	(459,000)	(477,000)	(1,338,000)	(1,428,000)
Foreign Exchange Contract [Member]
Derivative [Line Items]
Gain (loss) recognized in OCI	12,880,000	(110,404,000)	6,833,000	(19,867,000)
Gain on Release of cumulative translation adjustment related to net investment hedge of an equity investment	$ 528,000		$ 528,000