Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified				3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 30, 2013 Tax Increment Financing Bond [Member]	Sep. 30, 2012 Tax Increment Financing Bond [Member]	Sep. 30, 2013 Tax Increment Financing Bond [Member]	Sep. 30, 2012 Tax Increment Financing Bond [Member]	Sep. 30, 2013 Cash Flow Hedges [Member]	Sep. 30, 2012 Cash Flow Hedges [Member]	Sep. 30, 2013 Cash Flow Hedges [Member]	Sep. 30, 2012 Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) Calculation [Roll Forward]
Beginning balance	$ (5,003)	$ (12,628)	$ (13,426)	$ (1,599)	$ (1,726)	$ (1,898)	$ (2,309)	$ (2,543)	$ (9,053)	$ (10,730)	$ (3,425)
Unrealized gains/(losses)				97	(101)	396	482	(1,798)	(3,337)	4,801	(10,424)
Amortization reclassified out of AOCL								840	791	2,428	2,250
Ending balance	(5,003)	(12,628)	(13,426)	(1,502)	(1,827)	(1,502)	(1,827)	(3,501)	(11,599)	(3,501)	(11,599)
Total accumulated other comprehensive loss	$ (5,003)	$ (12,628)	$ (13,426)	$ (1,502)	$ (1,827)	$ (1,502)	$ (1,827)	$ (3,501)	$ (11,599)	$ (3,501)	$ (11,599)