Income Taxes - Reconciliation of Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Expected tax expense (benefit) at federal statutory	$ 275	$ 326	$ 1,958	$ 72
State income taxes, net of federal tax effect	82	70	551	15
Revaluation of deferred tax liabilities	(7,675)	0	(6,629)	0
Stranded tax effects reclassified from other comprehensive income	1,620	0	1,620	0
Excess tax benefit from share based compensation and other expense, net	276	(255)	185	(771)
Income tax (benefit) expense	$ (5,422)	$ 141	$ (2,315)	$ (684)

Effective Income Tax Rate Reconciliation, Reclassification From Other Comprehensive Income

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Effective Income Tax Rate Reconciliation, Revaluation Of Deferred Tax Liabilities

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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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 from continuing operations.

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Amount 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 state and local income tax expense (benefit).

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