Income Taxes (Schedule Of Deferred Income Tax Liabilities And Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Leasehold improvements, property and equipment	$ 127,706	$ 96,399
Goodwill and other assets	990	815
Total long-term deferred income tax liability	128,696	97,214
Deferred Rent	35,645	30,806
Gift card liability	373	271
Capitalized transaction costs	504	502
Stock-based compensation and other employee benefits	28,079	15,548
Foreign net operating loss carry-forwards	1,397	617
Valuation allowance	(1,683)	(1,055)
Total long-term deferred income tax asset	64,315	46,689
Net long-term deferred income tax liability	64,381	50,525
Prepaid assets and other	1,982	1,532
Total current deferred income tax liability	1,982	1,532
Allowances, reserves and other	8,094	5,912
Other employee benefits	234	45
Valuation allowance	(108)	(108)
Total current deferred income tax asset	8,220	5,849
Net current deferred income tax asset	6,238	4,317
Total deferred income tax liability	$ 58,143	$ 46,208