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INCOME TAXES - Provision for Tax Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] |  |  |
Domestic | $ 223,438 | $ 168,117 | $ 156,571
Foreign | 46,277 | 6,433 | (8,332)
Income from operations before provision for income taxes | 269,715 | 174,550 | 148,239
Current: |  |  |
Federal | 42,480 | 33,327 | 20,482
State | 18,126 | 14,575 | 14,564
Foreign | 4,380 | 1,559 | 7,448
Current income taxes | 64,986 | 49,461 | 42,494
Deferred |  |  |
Federal | 2,275 | (965) | 7,933
State | (4,777) | (2,506) | 550
Foreign | 3,984 | (6,277) | (478)
Deferred income taxes | 1,482 | (9,748) | 8,005
Provision for income taxes | $ 66,468 | $ 39,713 | $ 50,499
Effective tax rate | 24.60% | 22.80% | 34.10%
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |
Tax expense at US statutory rate | $ 56,640 | $ 36,655 | $ 31,130
State income taxes, net of federal benefit | 12,101 | 9,837 | 10,597
Foreign rate differential | 1,922 | 1,256 | 276
Valuation allowance | (9,139) | (11,339) | 4,459
Uncertain tax position interest and penalties | 263 | (712) | 474
Tax credits expired (used) | 2,530 | 2,039 | (50)
Non-deductible compensation | 2,326 | 1,406 | 1,922
Other | (175) | 571 | 1,691
Provision for income taxes | $ 66,468 | $ 39,713 | $ 50,499

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