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INCOME TAX PROVISION (income tax provision) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income before income taxes |  |  |
U.S. | $ (7,636) | $ 51,640 | $ 62,361
Foreign | 47,435 | 32,738 | 31,442
Income before income taxes | 39,799 | 84,378 | 93,803
Current tax provision: |  |  |
Federal | 20,999 | 27,789 | (61)
State | 6,331 | 8,507 | 2,389
Foreign | 18,118 | 11,081 | 10,945
Total current tax provision | 45,448 | 47,377 | 13,273
Deferred tax provision: |  |  |
Federal | (20,357) | (21,368) | 15,889
State | (4,389) | (5,710) | 1,958
Foreign | (7,130) | (1,451) | (89)
Total deferred tax provision | (31,876) | (28,529) | 17,758
Income tax provision | $ 13,572 | $ 18,848 | $ 31,031
Reconciliation of effective tax rate to U.S. statutory tax rate |  |  |
Income tax at federal statutory rate | 21.00% | 21.00% | 21.00%
Change in valuation allowances | 17.50% | 7.20% | 0.10%
Tax impact of share-based compensation | 6.70% | 3.20% | 0.90%
Tax on repatriation of foreign earnings | 6.20% | 2.20% | 4.90%
Foreign tax rate differences | 5.70% | 1.90% | 1.70%
Non-deductible executive compensation | 4.10% | 2.20% | 1.70%
Return to provision adjustments | 2.00% | (1.90%) | 0.00%
State income tax expense, net of federal income tax benefit | 2.00% | 2.70% | 2.40%
Change in state deferred income tax rates | 1.70% | 0.30% | 0.10%
Non-deductible acquisition costs | 0.20% | 0.10% | 1.50%
Business exits (Note 6) | (30.20%) | (15.80%) | 0.00%
Research and development tax credit | (3.00%) | (1.20%) | (0.90%)
Other | 0.20% | 0.40% | (0.30%)
Effective tax rate | 34.10% | 22.30% | 33.10%

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