Accumulated Other Comprehensive Loss (Changes in AOCI) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	$ (6,829)
Other Comprehensive Loss Before Reclassifications	(44)
Amounts Reclassified from Accumulated Other Comprehensive Loss	2,282
Net Current Period Other Comprehensive Income (Loss)	2,238
Balance as of June 30, 2013	(4,591)
Interest Rate Protection Agreements
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	(7,008)
Other Comprehensive Loss Before Reclassifications	0
Amounts Reclassified from Accumulated Other Comprehensive Loss	2,282
Net Current Period Other Comprehensive Income (Loss)	2,282
Balance as of June 30, 2013	(4,726)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	179
Other Comprehensive Loss Before Reclassifications	(44)
Amounts Reclassified from Accumulated Other Comprehensive Loss	0
Net Current Period Other Comprehensive Income (Loss)	(44)
Balance as of June 30, 2013	$ 135