Accumulated Other Comprehensive Loss (Changes in AOCI) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	$ (6,557)
Other Comprehensive Income (Loss) Before Reclassifications	(54)
Amounts Reclassified from Accumulated Other Comprehensive Loss	768
Net Current Period Other Comprehensive Income (Loss)	714
Balance as of March 31, 2013	(5,843)
Interest Rate Protection Agreements
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	(7,008)
Other Comprehensive Income (Loss) Before Reclassifications	0
Amounts Reclassified from Accumulated Other Comprehensive Loss	768
Net Current Period Other Comprehensive Income (Loss)	768
Balance as of March 31, 2013	(6,240)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	138
Other Comprehensive Income (Loss) Before Reclassifications	2
Amounts Reclassified from Accumulated Other Comprehensive Loss	0
Net Current Period Other Comprehensive Income (Loss)	2
Balance as of March 31, 2013	140
Comprehensive Income (Loss) Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2012	313
Other Comprehensive Income (Loss) Before Reclassifications	(56)
Amounts Reclassified from Accumulated Other Comprehensive Loss	0
Net Current Period Other Comprehensive Income (Loss)	(56)
Balance as of March 31, 2013	$ 257