CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income	$ 2,164,685	$ 1,752,302	$ 1,391,042
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property, equipment and intangibles	328,217	314,635	270,875
Amortization of debt discount and issuance costs	4,388	4,580	3,916
Deferred income taxes	20,383	12,381	21,158
Share-based compensation programs	24,656	22,747	21,921
Other	2,128	4,686	7,529
Changes in operating assets and liabilities:
Accounts receivable	(47,427)	(20,515)	(15,577)
Inventory	(32,634)	(198,864)	(239,912)
Accounts payable	510,911	580,608	213,423
Income taxes payable	152,339	197,739	(20,139)
Accrued payroll	18,714	(11,941)	14,296
Accrued benefits and withholdings	9,214	189,332	16,868
Other	51,736	(11,087)	23,079
Net cash provided by operating activities	3,207,310	2,836,603	1,708,479
Investing activities:
Purchases of property and equipment	(442,853)	(465,579)	(628,057)
Proceeds from sale of property and equipment	9,494	15,770	7,118
Investment in tax credit equity investments	(180,333)	(164,111)	(33,781)
Other	(1,928)	(975)	(142,026)
Net cash used in investing activities	(615,620)	(614,895)	(796,746)
Financing activities:
Proceeds from borrowings on revolving credit facility	0	1,162,000	2,708,000
Payments on revolving credit facility	0	(1,423,000)	(2,734,000)
Proceeds from the issuance of long-term debt	0	997,515	499,955
Principal payments on long-term debt	(300,000)	(500,000)	0
Payment of debt issuance costs	(3,412)	(7,929)	(3,990)
Repurchases of common stock	(2,476,048)	(2,087,194)	(1,432,791)
Net proceeds from issuance of common stock	84,915	62,284	60,206
Other	(313)	(253)	(191)
Net cash used in financing activities	(2,694,858)	(1,796,577)	(902,811)
Effect of exchange rate changes on cash	(359)	103	169
Net (decrease) increase in cash and cash equivalents	(103,527)	425,234	9,091
Cash and cash equivalents at beginning of the period	465,640	40,406	31,315
Cash and cash equivalents at end of the period	362,113	465,640	40,406
Supplemental disclosures of cash flow information:
Income taxes paid	450,935	305,087	394,931
Interest paid, net of capitalized interest	$ 144,293	$ 159,717	$ 134,634