CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018
Cash flows from operating activities:
Net income	$ 418,175	$ 395,506
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	144,584	131,383
(Gain) / loss on disposition of property and equipment	(262)	(285)
Share-based compensation expense	25,755	22,787
Deferred income taxes	8,495	5,009
Change in assets and liabilities:
Inventories	(223,230)	(284,065)
Prepaid expenses and other current assets	9,961	(21,226)
Accounts payable	59,810	107,104
Accrued employee compensation	(4,810)	20,000
Other accrued expenses	(21,622)	667
Income taxes	(3,257)	(29,667)
Other	728	6,206
Net cash provided by operating activities	414,327	353,419
Cash flows from investing activities:
Capital expenditures	(144,342)	(193,693)
Proceeds from sale of property and equipment	2,317	2,029
Net cash used in investing activities	(142,025)	(191,664)
Cash flows from financing activities:
Borrowings under debt facilities	947,000	968,500
Repayments under debt facilities	(710,750)	(820,750)
Debt issuance costs	0	(346)
Principal payments under finance lease liabilities	(2,741)	(2,725)
Repurchase of shares to satisfy tax obligations	(3,790)	(622)
Repurchase of common stock	(489,977)	(289,205)
Net proceeds from issuance of common stock	105,543	54,706
Cash dividends paid to stockholders	(121,246)	(109,159)
Net cash used in financing activities	(275,961)	(199,601)
Net change in cash and cash equivalents	(3,659)	(37,846)
Cash and cash equivalents at beginning of period	86,299	109,148
Cash and cash equivalents at end of period	82,640	71,302
Cash paid during the period for:
Interest Paid, Excluding Capitalized Interest, Operating Activities	15,189	15,445
Income taxes	112,693	137,041
Supplemental disclosures of non-cash activities:
Non-cash accruals for construction in progress	10,981	15,521
Operating lease assets and liabilities recognized upon adoption of ASC 842	2,084,880	0
Increase of operating lease assets and liabilities from new or modified leases	240,969	0
Increase of finance lease assets and liabilities from new or modified leases	$ 2,883	$ 0