Leases Future Minimum Lease Payments (Details) (USD $)	Dec. 31, 2011
Capital Leases, Future Minimum Payments Due [Abstract]
2012	$ 24,700,000
2013	24,800,000
2014	25,000,000
2015	24,700,000
2016	23,900,000
Thereafter	117,200,000
Total minimum lease payments	240,300,000
Less interest	(96,300,000)
Capital lease obligations	144,000,000
Less current portion (1)	(9,627,000)	[1]
Long-term capital lease obligations	134,400,000
Operating Leases, Future Minimum Payments Due [Abstract]
2012	76,900,000
2013	77,700,000
2014	77,400,000
2015	78,000,000
2016	76,400,000
Thereafter	656,400,000
Total minimum lease payments	$ 1,042,800,000

[1] Included in current maturities of capital lease and financing obligations on the consolidated balance sheet.