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Income Taxes (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Deferred tax assets |  |  |
Net deferred tax assets | $ 4,892,000 | $ 9,603,000 |
Valuation allowance | (681,000) | (676,000) |
Total net deferred tax assets | 52,575,000 | 49,449,000 |
Deferred Tax Assets, Gross [Abstract] |  |  |
Accrued incentive compensation | 11,117,000 | 5,092,000 |
Net operating loss carryforward | 487,000 | 558,000 |
Workers’ compensation accruals | 6,592,000 | 6,310,000 |
Accrued rent | 1,858,000 | 1,553,000 |
Stock-based compensation | 8,886,000 | 11,383,000 |
DeferredTaxAssetsOperatingLeaseLiablities | 21,722,000 | 21,024,000 |
Minority investment impairment | 681,000 | 676,000 |
CARESActDTA | 1,626,000 | 3,235,000 |
Other | 287,000 | 294,000 |
Total deferred tax assets | 53,256,000 | 50,125,000 |
Deferred tax liabilities |  |  |
Prepaid assets | (4,665,000) | (4,207,000) |
Depreciation | (8,210,000) | (4,941,000) |
Software development costs | (11,140,000) | (8,230,000) |
Deferred Tax Liabilities, Other | (3,517,000) | (3,702,000) |
Deferred Tax Liabilities, Leasing Arrangements | (18,205,000) | (17,322,000) |
Deferred Tax Liabilities, Goodwill and Intangible Assets | (1,946,000) | (1,444,000) |
Total deferred tax liabilities | (47,683,000) | (39,846,000) |
Current income tax expense |  |  |
Federal | 30,887,000 | 45,558,000 | $ 27,385,000
State | 8,640,000 | 11,122,000 | 6,299,000
Total current income tax expense | 39,527,000 | 56,680,000 | 33,684,000
Deferred income tax (benefit) expense |  |  |
Federal | 4,562,000 | (4,678,000) | 4,016,000
State | 149,000 | (969,000) | 844,000
Total deferred income tax (benefit) expense | 4,711,000 | (5,647,000) | 4,860,000
Total income tax expense | 44,238,000 | 51,033,000 | 38,544,000
Reconciliation of income tax expense [Abstract] |  |  |
Expected income tax expense at 21% | 35,347,000 | 39,747,000 | 39,825,000
State income taxes, net of federal benefit | 6,974,000 | 7,818,000 | 5,821,000
Nondeductible expenses | 7,362,000 | 3,641,000 | 5,959,000
Equity compensation, net | (4,427,000) | 1,335,000 | (12,120,000)
Research and development credit | (1,018,000) | (1,479,000) | (1,069,000)
Other, net | 0 | (29,000) | 128,000
Total income tax expense | 44,238,000 | 51,033,000 | 38,544,000
Liability for Uncertain Tax Positions, Current | $ 0 | $ 0 | $ 0
Assumed income tax rate (in hundredths) | 21.00% |  |
ExpensAble [Member] |  |  |
Operating Loss Carryforwards | $ 1,900,000 |  |

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