CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 25, 2016	Jun. 27, 2015
Cash flows from operating activities:
Net income	$ 224,093	$ 211,371
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	67,634	60,595
Loss (gain) on disposition of property and equipment	233	(15)
Share-based compensation expense	11,212	9,835
Excess tax benefit of stock options exercised	(10,282)	(12,900)
Deferred income taxes	(3,618)	(11,236)
Change in assets and liabilities:
Inventories	(82,124)	(177,696)
Prepaid expenses and other current assets	19,897	4,405
Accounts payable	3,145	81,846
Accrued employee compensation	(14,940)	(8,146)
Other accrued expenses	(9,972)	(4,533)
Income taxes	59,424	78,414
Other	3,214	1,475
Net cash provided by operating activities	267,916	233,415
Cash flows from investing activities:
Capital expenditures	(100,956)	(97,014)
Proceeds from sale of property and equipment	40	301
Net cash used in investing activities	(100,916)	(96,713)
Cash flows from financing activities:
Borrowings under senior credit facility	595,000	180,000
Repayments under senior credit facility	547,500	180,000
Debt issuance costs	(1,380)	0
Excess tax benefit of stock options exercised	10,282	12,900
Principal payments under capital lease obligations	(513)	(199)
Repurchase of shares to satisfy tax obligations	(843)	(1,095)
Repurchase of common stock	(106,905)	(124,540)
Net proceeds from issuance of common stock	30,943	30,466
Cash dividends paid to stockholders	(58,785)	(49,051)
Net cash used in financing activities	(79,701)	(131,519)
Net change in cash and cash equivalents	87,299	5,183
Cash and cash equivalents at beginning of period	63,813	51,134
Cash and cash equivalents at end of period	151,112	56,317
Cash paid during the period for:
Interest	2,153	694
Income taxes	73,205	57,367
Supplemental disclosures of non-cash activities:
Property and equipment acquired through capital lease	5,218	4,122
Non-cash accruals for construction in progress	$ 32,075	$ 22,442