CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 167,586	$ 146,949
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	46,919	44,172
(Gain) loss on disposition of property and equipment	(178)	146
Stock compensation expense	6,934	9,309
Excess tax benefit of stock options exercised	(24,804)	(16,497)
Deferred income taxes	4,529	(5,887)
Change in assets and liabilities:
Inventories	(174,745)	(116,115)
Prepaid expenses and other current assets	(868)	(4,603)
Accounts payable	40,419	48,348
Accrued employee compensation	(21,617)	(18,936)
Other accrued expenses	(19,639)	(6,422)
Income taxes payable	34,927	68,783
Other	3,360	2,923
Net cash provided by operating activities	62,823	152,170
Cash flows from investing activities:
Capital expenditures	(98,626)	(65,566)
Proceeds from sale of property and equipment	235	0
Decrease in restricted cash	8,400	13,070
Net cash used in investing activities	(89,991)	(52,496)
Cash flows from financing activities:
Borrowings under revolving credit agreement	135,000	0
Repayments under revolving credit agreement	(135,000)	0
Excess tax benefit of stock options exercised	24,804	16,497
Principal payments under capital lease obligations	(17)	(19)
Repurchase of shares to satisfy tax obligations	(3,942)	(6,581)
Repurchase of common stock	(69,304)	(102,536)
Net proceeds from issuance of common stock	24,808	18,146
Cash dividends paid to stockholders	(32,113)	(23,046)
Net cash used in financing activities	(55,764)	(97,539)
Net (decrease) increase in cash and cash equivalents	(82,932)	2,135
Cash and cash equivalents at beginning of period	138,630	176,965
Cash and cash equivalents at end of period	55,698	179,100
Cash paid during the period for:
Interest	276	86
Income taxes	59,003	22,616
Non-cash accruals for construction in progress	$ 20,637	$ 1,181