Goodwill, Franchise Rights and Other Intangibles Intangibles (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Finite-Lived Intangible Assets [Line Items]
Franchise rights and other identifiable intangibles, net	$ 17,255,000	$ 20,825,000
Amortization expense	8,024,000	8,342,000	8,336,000
Trademarks
Finite-Lived Intangible Assets [Line Items]
Franchise rights and other identifiable intangibles, net	1,000,000
Franchise Rights
Finite-Lived Intangible Assets [Line Items]
Franchise rights and other identifiable intangibles, net	13,500,000	17,100,000
Finite-Lived Intangible Assets, Remaining Amortization Period	10
Finite-Lived Intangible Assets, Useful Life, Minimum	5
Finite-Lived Intangible Assets, Useful Life, Maximum	17
Amortization expense	3,600,000	4,200,000	3,800,000
Finite-Lived Intangible Assets, Accumulated Amortization	70,200,000	66,600,000
Finite-Lived Intangible Assets, Future Amortization Expense, Five Succeeding Fiscal Years
2012	3,500,000
2013	3,500,000
2014	3,300,000
2015	2,300,000
2016	400,000
Trademarks
Finite-Lived Intangible Assets [Line Items]
Franchise rights and other identifiable intangibles, net	3,800,000	3,800,000
Amortization expense	500,000	600,000	600,000
Finite-Lived Intangible Assets, Accumulated Amortization	(6,400,000)	(6,600,000)
Finite-Lived Intangible Assets, Future Amortization Expense, Five Succeeding Fiscal Years
2012	500,000
2013	500,000
2014	400,000
2015	400,000
2016	$ 300,000