CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Cash flows from operating activities:
Net income	$ 232,353	$ 196,970
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	73,056	66,380
Gain on disposition of property and equipment	(170)	(65)
Stock compensation expense	10,349	14,051
Excess tax benefit of stock options exercised	(31,626)	(19,738)
Deferred income taxes	(3,485)	(14,789)
Change in assets and liabilities:
Inventories	(233,897)	(189,321)
Prepaid expenses and other current assets	6,014	836
Accounts payable	83,129	95,650
Accrued employee compensation	(20,002)	(19,040)
Other accrued expenses	(12,982)	(11,613)
Income taxes payable	(9,410)	32,698
Other	5,281	3,822
Net cash provided by operating activities	98,610	155,841
Cash flows from investing activities:
Capital expenditures	(156,791)	(111,176)
Proceeds from sale of property and equipment	331	321
Decrease in restricted cash	8,400	13,470
Net cash used in investing activities	(148,060)	(97,385)
Cash flows from financing activities:
Borrowings under revolving credit agreement	175,000	0
Repayments under revolving credit agreement	(135,000)	0
Excess tax benefit of stock options exercised	31,626	19,738
Principal payments under capital lease obligations	(27)	(27)
Repurchase of shares to satisfy tax obligations	(3,942)	(6,581)
Repurchase of common stock	(90,601)	(163,840)
Net proceeds from issuance of common stock	30,024	22,710
Cash dividends paid to stockholders	(50,272)	(37,236)
Net cash used in financing activities	(43,192)	(165,236)
Net decrease in cash and cash equivalents	(92,642)	(106,780)
Cash and cash equivalents at beginning of period	138,630	176,965
Cash and cash equivalents at end of period	45,988	70,185
Cash paid during the period for:
Interest	406	1,143
Income taxes	148,519	95,577
Non-cash accruals for construction in progress	$ 11,798	$ 8,911