Income Taxes (Provision for Income Taxes from Continuing Operations Differs from the Federal Statutory Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory rate	$ 20,908	$ 22,629	$ 16,397
State taxes, less federal effect	4,068	3,650	3,194
Federal tax credits	(587)	(1,064)	(1,621)
Excess tax benefit on stock based compensation	(2,039)	(1,674)	(871)
Uncertain tax positions	0	0	(260)
Executive compensation	1,781	1,114	1,132
Change in valuation allowance	0	(130)	88
Other	915	(57)	94
Provision for income taxes	$ 25,046	$ 24,468	$ 18,153
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory rate	21.00%	21.00%	21.00%
State taxes, less federal effect	4.10%	3.40%	4.10%
Federal tax credits	(0.60%)	(1.00%)	(2.10%)
Excess tax benefit on stock based compensation	(2.00%)	(1.60%)	(1.10%)
Uncertain tax positions	0.00%	0.00%	(0.30%)
Executive compensation	1.80%	1.00%	1.40%
Change in valuation allowance	0.00%	(0.10%)	0.10%
Other	0.90%	0.00%	0.10%
Effective income tax rate, percentage	25.20%	22.70%	23.20%

Effective Income Tax Rate Reconciliation, Executive Compensation, Amount

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing 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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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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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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 income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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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 increase (decrease) in the valuation allowance for deferred tax 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 from continuing operations.

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