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INCOME TAXES (Provision for Tax Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract] |  |  |
Domestic | $ 168,117 | $ 156,571 | $ 115,070
Foreign | 6,433 | (8,332) | (20,588)
Income before provision for income taxes | 174,550 | 148,239 | 94,482
Current: |  |  |
Federal | 33,327 | 20,482 | (7,677)
State | 14,575 | 14,564 | 12,653
Foreign | 1,559 | 7,448 | 4,781
Current income taxes | 49,461 | 42,494 | 9,757
Deferred |  |  |
Federal | (965) | 7,933 | 19,899
State | (2,506) | 550 | (1,205)
Foreign | (6,277) | (478) | 395
Deferred income taxes | (9,748) | 8,005 | 19,089
Provision for income taxes | $ 39,713 | $ 50,499 | $ 28,846
Effective tax rate | 22.80% | 34.10% | 30.50%
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |
Tax expense at US statutory rate | $ 36,655 | $ 31,130 | $ 19,841
State income taxes, net of federal benefit | 9,837 | 10,597 | 8,711
Foreign rate differential | 1,256 | 276 | (1,124)
Valuation allowance | (11,339) | 4,459 | 10,466
Uncertain tax position interest and penalties | (712) | 474 | (1,806)
Tax credits | 2,039 | (50) | (9,799)
Non-deductible compensation | 1,406 | 1,922 | 1,813
Other | 571 | 1,691 | 1,032
Adjustment for Tax Cuts and Jobs Act | 0 | 0 | (288)
Provision for income taxes | $ 39,713 | $ 50,499 | $ 28,846

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