Derivative Instruments And Hedging Activities , Statement of Operation Location (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI (Effective Portion)	$ 85	$ 343	$ 177	$ 599
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	0	0	0	0
Amount of Gain or (Loss) Recognized in Income on Derviative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0	3
Interest rate swaps and cap agreement [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI (Effective Portion)	85	343	177	599
Interest rate swaps and cap agreement [Member] | Interest expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	0	0	0	0
Amount of Gain or (Loss) Recognized in Income on Derviative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$ 0	$ 0	$ 0	$ 3