Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended				3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Joint Ventures	Mar. 31, 2014 Property Lease Guarantee Joint Venture One	Mar. 31, 2014 Financial Guarantee Joint Venture Two	Dec. 31, 2013 Financial Guarantee Joint Venture Two	Mar. 31, 2014 Performance Guarantee	Mar. 31, 2014 Pending Litigation
Loss Contingencies [Line Items]
Letters of credit outstanding	$ 8.3	$ 8.3
Maximum range of possible loss contingency								10.0
Accrued loss contingency	7.9
Equity method investments ownership percentage			50.00%		50.00%
Lease, initial term				10 years 7 months
Maximum guarantee					8.0		5.0
Mortgage loan					38.5
Total borrowings on the loan					30.5	28.3
Unrecorded guarantee obligation					2.7	1.5
Guarantee obligation	$ 0.8	$ 0.8					$ 0.8
Franchise agreement, period							20 years
Shareholder agreements, portion of directors entitled to elect, percent			0.5
Partnership agreements, voting managing interest, percent			50.00%