Consolidated Balance Sheets (USD $)	Dec. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 196,493,000	$ 125,245,000
Trade accounts receivable, net	36,584,000us-gaap_AccountsReceivableNetCurrent	32,965,000us-gaap_AccountsReceivableNetCurrent
Other accounts receivable	70,069,000us-gaap_OtherAssetsCurrent	51,637,000us-gaap_OtherAssetsCurrent
Inventories	22,811,000us-gaap_InventoryGross	21,916,000us-gaap_InventoryGross
Prepaid expenses and other	51,588,000us-gaap_PrepaidExpenseCurrent	43,064,000us-gaap_PrepaidExpenseCurrent
Deferred income taxes	28,621,000us-gaap_DeferredTaxAssetsNetCurrent	27,889,000us-gaap_DeferredTaxAssetsNetCurrent
Total current assets	406,166,000us-gaap_AssetsCurrent	302,716,000us-gaap_AssetsCurrent
Property and equipment, net	787,294,000us-gaap_PropertyPlantAndEquipmentNet	669,409,000us-gaap_PropertyPlantAndEquipmentNet
Other assets:
Goodwill	120,778,000us-gaap_Goodwill	123,013,000us-gaap_Goodwill
Other intangible assets, net	70,940,000us-gaap_FiniteLivedIntangibleAssetsNet	79,768,000us-gaap_FiniteLivedIntangibleAssetsNet
Deposits Assets, Noncurrent	5,724,000us-gaap_DepositsAssetsNoncurrent	5,956,000us-gaap_DepositsAssetsNoncurrent
Total other assets	197,442,000us-gaap_OtherAssetsNoncurrent	208,737,000us-gaap_OtherAssetsNoncurrent
Total assets	1,390,902,000us-gaap_Assets	1,180,862,000us-gaap_Assets
Current liabilities:
Accounts payable	19,511,000us-gaap_AccountsPayableCurrent	17,533,000us-gaap_AccountsPayableCurrent
Accrued expenses	333,201,000us-gaap_AccruedLiabilitiesCurrent	285,792,000us-gaap_AccruedLiabilitiesCurrent
Total current liabilities	352,712,000us-gaap_LiabilitiesCurrent	303,325,000us-gaap_LiabilitiesCurrent
Long-term debt	100,000,000us-gaap_UnsecuredLongTermDebt	0us-gaap_UnsecuredLongTermDebt
Deferred rent	67,390,000us-gaap_DeferredRentCreditNoncurrent	65,974,000us-gaap_DeferredRentCreditNoncurrent
Deferred income taxes	76,589,000	65,398,000
Other long-term liabilities	58,027,000us-gaap_OtherLiabilitiesNoncurrent	46,273,000us-gaap_OtherLiabilitiesNoncurrent
Total liabilities	654,718,000us-gaap_Liabilities	480,970,000us-gaap_Liabilities
Commitments and contingencies (Note 13)
Common stock, $.0001 par value:
Treasury stock, carried at cost; 5,260,744 shares at December 30, 2014 and 4,283,405 shares at December 31, 2013	(706,073,000)us-gaap_TreasuryStockValue	(546,570,000)us-gaap_TreasuryStockValue
Preferred stock, $.0001 par value per share; 2,000,000 shares authorized and no shares issued or outstanding at December 30, 2014 and December 31, 2013	0us-gaap_PreferredStockValueOutstanding	0us-gaap_PreferredStockValueOutstanding
Additional paid-in capital	214,437,000	196,908,000
Accumulated other comprehensive income	(1,360,000)	(333,000)
Retained earnings	1,229,177,000	1,049,884,000
Total stockholders' equity	736,184,000us-gaap_StockholdersEquity	699,892,000us-gaap_StockholdersEquity
Total liabilities and stockholders' equity	1,390,902,000	1,180,862,000
Common Stock Class A [Member]
Common stock, $.0001 par value:
Common Stock	3,000	3,000
Common Class B [Member]
Common stock, $.0001 par value:
Common Stock	$ 0	$ 0

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).