CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 25, 2011
Cash flows from operating activities:
Net income	$ 146,949	$ 109,495
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	44,172	37,094
Loss on disposition of property and equipment	146	569
Stock compensation expense	9,309	6,989
Excess tax benefit of stock options exercised	(16,497)	(8,897)
Deferred income taxes	(5,887)	4,368
Change in assets and liabilities:
Inventories	(116,115)	(138,963)
Prepaid expenses and other current assets	(4,603)	(12,418)
Accounts payable	48,348	104,375
Accrued employee compensation	(18,936)	(15,259)
Other accrued expenses	(6,422)	(11,931)
Income taxes payable	68,783	43,059
Other	2,923	(1,120)
Net cash provided by operating activities	152,170	117,361
Cash flows from investing activities:
Capital expenditures	(65,566)	(74,084)
Proceeds from sale of property and equipment	0	138
Decrease (increase) in restricted cash	13,070	(21,870)
Proceeds from sale of short-term investments	0	15,913
Net cash used in investing activities	(52,496)	(79,903)
Cash flows from financing activities:
Excess tax benefit of stock options exercised	16,497	8,897
Principal payments under capital lease obligations	(19)	(74)
Restricted stock units withheld to satisfy tax obligations	(6,581)	(981)
Repurchase of common stock	(102,536)	(122,873)
Net proceeds from issuance of common stock	18,146	19,509
Cash dividends paid to stockholders	(23,046)	(13,758)
Net cash used in financing activities	(97,539)	(109,280)
Net increase (decrease) in cash and cash equivalents	2,135	(71,822)
Cash and cash equivalents at beginning of period	176,965	257,339
Cash and cash equivalents at end of period	179,100	185,517
Cash paid during the period for:
Interest	86	214
Income taxes	22,616	14,596
Non-cash accruals for construction in progress	$ 1,181	$ 576