Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Taxes

Schedule of components of income from continuing operations before income taxes

	For the Year Ended
	December 31,
	2019		2018		2017
Domestic	$	1,790,207	$	1,694,087	$	1,637,804
International		122		—		—
Income before income taxes	$	1,790,329	$	1,694,087	$	1,637,804

Schedule of components of the provision for income taxes

	For the Year Ended
	December 31,
	2019		2018		2017
Current:
Federal income tax expense	$	315,061	$	289,953	$	467,577
State income tax expense		62,795		59,487		41,183
International income tax expense		273		—		—
Total current		378,129		349,440		508,760
Deferred:
Federal income tax expense (benefit)		19,367		16,309		(13,053)
State income tax expense		2,027		3,851		8,293
International income tax benefit		(236)		—		—
Total deferred		21,158		20,160		(4,760)
Net income tax expense	$	399,287	$	369,600	$	504,000

Reconciliation of the provision for income taxes to the amounts computed at the federal statutory rate

	For the Year Ended
	December 31,
	2019		2018		2017
Federal income taxes at statutory rate	$	375,942	$	355,758	$	573,231
State income taxes, net of federal tax benefit		54,739		56,345		39,062
Excess tax benefit from share-based compensation		(25,992)		(34,703)		(48,688)
Revaluation of deferred tax liability		—		(1,262)		(53,240)
Other items, net		(5,402)		(6,538)		(6,365)
Total provision for income taxes	$	399,287	$	369,600	$	504,000

Schedule of deferred tax assets and liabilities

	December 31,
	2019		2018
Deferred tax assets:
Allowance for doubtful accounts	$	2,008	$	1,944
Tax credits		3,417		5,606
Other accruals		97,189		105,894
Operating lease liability		494,093		—
Other		15,732		14,770
Total deferred tax assets		612,439		128,214
Deferred tax liabilities:
Inventories		65,346		62,846
Property and equipment		162,613		140,019
Operating lease asset		479,821		—
Other		37,939		30,915
Total deferred tax liabilities		745,719		233,780
Net deferred tax liabilities	$	(133,280)	$	(105,566)

Summary of changes in gross amount of unrecognized tax benefits, excluding interest and penalties

	2019		2018		2017
Unrealized tax benefit, balance at January 1,	$	33,766	$	35,388	$	34,798
Additions based on tax positions related to the current year		4,627		3,550		6,299
Additions based on tax positions related to prior years		—		4,255		—
Payments related to items settled with taxing authorities		(443)		(2,792)		—
Reductions due to the lapse of statute of limitations and settlements		(6,475)		(6,635)		(5,709)
Unrealized tax benefit, balance at December 31,	$	31,475	$	33,766	$	35,388