Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of location and fair value amounts of derivatives in the unaudited condensed consolidated balance sheets
Total	$ (11,957)	$ (11,022)
Interest Rate Cap [Member] | Not Designated as Hedging Instrument [Member] | Other Long Term Assets [Member]
Schedule of location and fair value amounts of derivatives in the unaudited condensed consolidated balance sheets
Fair Value, Assets	65	376
Green Bay Option [Member] | Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Schedule of location and fair value amounts of derivatives in the unaudited condensed consolidated balance sheets
Fair value, Liabilities	(12,022)
Green Bay Option [Member] | Not Designated as Hedging Instrument [Member] | Other long-term liabilities [Member]
Schedule of location and fair value amounts of derivatives in the unaudited condensed consolidated balance sheets
Fair value, Liabilities		$ (11,398)