Income Taxes - Reconciliation of Income Tax Attributable to Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amount
Tax (benefit) provision at United States statutory rates on consolidated income or loss from continuing operations subject to tax	$ (3,516)	$ (2,836)	$ 33,296
State income tax expense, net of federal tax (benefit) expense	(1,964)	3,935	11,933
Effect of permanent differences	434	(139)	302
Tax effect of intercompany transactions	0	0	(33,250)
Tax credits	(296)	(667)	(6,897)
Tax reform revaluation	0	0	288
Decrease in valuation allowance	0	(164)	(20,434)
Separation	7,596	0	0
TRS REIT election	90,914	0	0
Other	2,269	176	1,416
Total expense (benefit)	$ 95,437	$ 305	$ (13,346)
Percent
Tax (benefit) provision at United States statutory rates on consolidated income or loss from continuing operations subject to tax	21.00%	21.00%	21.00%
State income tax expense, net of federal tax (benefit) expense	11.70%	(29.10%)	7.70%
Effect of permanent differences	(2.60%)	1.00%	0.20%
Tax effect of intercompany transactions	0.00%	0.00%	(21.00%)
Tax credits	1.80%	4.90%	(4.40%)
Tax reform revaluation			0.002
Decrease in valuation allowance	0.00%	1.20%	(12.90%)
Separation	(45.40%)
TRS REIT election	(543.10%)
Other	(13.60%)	(1.30%)	0.90%
Total income tax expense (benefit)	(570.20%)	(2.30%)	(8.30%)

Effective Income Tax Rate Reconciliation Effect Of Intercompany Transfers Of Assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income (continuing and discontinued operations).

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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