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Income Taxes - Summary of Effective Tax Rates Differ from Federal Statutory Rates (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%
Increase (decrease) in tax rate resulting from:
Meals and entertainment	0.00%	0.20%	0.20%
State income taxes, net of federal tax benefit	8.50%	8.30%	7.30%
Stock option expense and related excess tax benefits	0.10%	(0.70%)	(1.90%)
Company owned life insurance	(0.10%)	(0.30%)	(1.40%)
Other, net	(0.40%)	(0.50%)	(1.00%)
Effective tax rate	29.10%	28.00%	24.20%

X

- Definition

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

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-Name Accounting Standards Codification
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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 life insurance expense.

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