Derivatives (Details 4) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Amount of Net Loss Recorded in Other Comprehensive Income (Effective Portion)	$ 2,279,000	$ (135,000)	$ 1,804,000	$ (266,000)
Amount of Net Loss Reclassified from OCI to Earnings	1,434,000	1,152,000	2,789,000	2,331,000
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			3,600,000
Unrealized Holding Losses - Cash Flow Hedge Instruments, Net of Tax	$ (1,731,000)		$ (1,731,000)