Long-Term Debt (Details) (USD $) In Millions, unless otherwise specified		0 Months Ended
	Oct. 01, 2013	Oct. 16, 2013 Subsequent event rent	Oct. 16, 2013 Subsequent event Minimum	Oct. 16, 2013 Subsequent event Maximum	Oct. 16, 2013 Subsequent event Adjusted LIBO Rate	Oct. 16, 2013 Subsequent event Adjusted LIBO Rate Minimum	Oct. 16, 2013 Subsequent event Adjusted LIBO Rate Maximum	Oct. 16, 2013 Subsequent event Federal Funds Effective Rate	Oct. 16, 2013 Subsequent event One-month Adjusted LIBO Rate	Oct. 16, 2013 Subsequent event One-month Adjusted LIBO Rate Minimum	Oct. 16, 2013 Subsequent event One-month Adjusted LIBO Rate Maximum
Long-term debt
Maximum commitments		$ 200
Maximum commitments, letter of credit subfacility		50
Additional available credit		100
Outstanding letters of credit	21
Outstanding borrowings	0
Financial covenant, Net Adjusted Leverage Ratio				4.0
Multiplier of rent used to compute Adjusted Debt		8
Threshold amount of unrestricted cash and cash equivalents above which amounts are netted against debt for calculation of net adjusted leverage ratio		$ 25
Trailing period for which EBITDAR is computed		12 months
Financial covenant, EBITDAR Ratio			1.9
Net Adjusted Leverage Ratio	2.6
EBITDAR Ratio	2.9
Credit facility, floating interest rate basis					Adjusted LIBO Rate			Federal Funds Effective Rate	one-month Adjusted LIBO Rate
Credit facility, basis spread on variable rate, (as a percent)						1.00%	1.75%	0.50%		0.00%	0.75%
Fixed percentage added to variable rate									1.00%
Commitment fee (as a percent)			0.15%	0.30%