Income Taxes (Tables) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2020

Dec. 31, 2019

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Provision for Income Taxes

The provision for income taxes consists of the following:

	Year Ended December 31,
	2020		2019		2018
Current:
Federal	$	151,532	$	115,610	$	126,358
State	42,769		34,586		37,038
Deferred:
Federal	(13,289)		(2,195)		138
State	(4,227)		(745)		(999)
Income tax expense	$	176,785	$	147,256	$	162,535

Tax Cuts and Jobs Act, Change in Tax Rate, Deferred Tax Asset, Income Tax Expense

$ 0

$ 0

$ (497)

Deferred Income Taxes on Consolidated Balance Sheets

Deferred income taxes on our consolidated balance sheets were comprised of the following:

	December 31,
	2020		2019
Deferred tax assets:
Other accrued expenses and contract land deposit reserve	$	67,520	$	52,726
Deferred compensation	4,608		4,635
Equity-based compensation expense	41,839		42,043
Inventory	13,118		10,530
Unrecognized tax benefit	11,705		12,355
Other	8,639		8,289
Total deferred tax assets	147,429		130,578
Less: Deferred tax liabilities	7,184		7,902
Net deferred tax asset	$	140,245	$	122,676

Income Tax Expense Reconciliation

A reconciliation of income taxes computed at the federal statutory rate (21%) to income tax expense is as follows:

	Year Ended December 31,
	2020		2019		2018
Income taxes computed at the federal statutory rate	$	226,387	$	215,417	$	201,544
State income taxes, net of federal income tax benefit (1)	47,469		45,770		42,944
Excess tax benefits from equity-based compensation	(92,234)		(101,466)		(77,478)
Remeasurement of net deferred tax assets due to enactment of Tax Cut and Jobs Act	—		—		(497)
Other, net (2)	(4,837)		(12,465)		(3,978)
Income tax expense	$	176,785	$	147,256	$	162,535

(1)Excludes state excess tax benefits from equity-based compensation included in the line below.

(2)    Primarily attributable to tax benefits from certain energy credits for the years ended December 31, 2020 and 2019.

Reconciliation of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	Year Ended December 31,
	2020		2019
Balance at beginning of year	$	39,356	$	43,418
Additions based on tax positions related to the current year	3,155		2,941
Reductions for tax positions of prior years	(5,694)		(7,003)
Settlements	—		—
Balance at end of year	$	36,817	$	39,356