Income Taxes (Schedule Of Deferred Income Tax Liabilities And Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Leasehold improvements, property and equipment	$ 204,640	$ 192,125
Goodwill and other assets	1,856	1,696
Prepaid assets and other	6,012	8,297
Total long-term deferred income tax liability	212,508	202,118
Deferred rent	63,159	57,716
Gift card liability	5,563	3,171
Capitalized transaction costs	500	502
Stock-based compensation and other employee benefits	101,628	83,058
Foreign net operating loss carry-forwards	9,580	11,407
State credits	4,595	4,783
Allowances, reserves and other	19,359	18,577
Valuation allowance	(10,820)	(9,401)
Total long-term deferred income tax asset	193,564	169,813
Net long-term deferred income tax liability	$ 18,944	$ 32,305