Income Taxes (Schedule Of Deferred Income Tax Liabilities And Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Income Taxes [Abstract]
Leasehold improvements, property and equipment	$ 140,908	$ 204,640
Goodwill and other assets	1,339	1,856
Prepaid assets and other	5,191	6,012
Total deferred income tax liability	147,438	212,508
Deferred rent	42,859	63,159
Gift card liability	4,580	5,563
Capitalized transaction costs	324	500
Stock-based compensation and other employee benefits	80,447	101,628
Foreign net operating loss carry-forwards	11,376	9,580
State credits	5,589	4,595
Allowances, reserves and other	13,719	19,359
Valuation allowance	(12,270)	(10,820)
Total deferred income tax asset	146,624	193,564
Net deferred income tax liability	$ 814	$ 18,944

The cumulative amount of the estimated future tax effects attributable to the difference between the tax basis of transaction costs and the basis of transaction costs computed in accordance with generally accepted accounting principles. The difference in basis, whether due to amortization or other reasons, will decrease future taxable income when such difference reverses.

No definition available.