INCOME TAXES - Effective tax rate - (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Effective income tax rate differs from the statutory rate
U.S. statutory rate (as a percent)	21.00%	21.00%	21.00%
State income taxes, net (as a percent)	2.60%	3.70%	2.30%
Foreign income tax rates (as a percent)	0.10%	0.30%	1.00%
Income tax credits and adjustments (as a percent)	(0.40%)	(0.60%)	(0.80%)
Adjustment of deferred tax balances related to Deferred Compensation	8.70%
Other adjustment of deferred tax balances	0.10%	(0.20%)	(0.70%)
Reserve for uncertain tax benefits (as a percent)	(0.10%)	(0.20%)	0.30%
Other, net (as a percent)	(0.60%)	(0.60%)	(0.40%)
Effective income tax rate (as a percent)	31.60%	23.40%	22.70%
Unrecognized tax benefits	$ 2,114	$ 2,313	$ 3,392
Portion of unrecognized tax benefits that, if recognized, would favorably affect annual effective income tax rate	1,671	1,736
Interest and penalties included in liability for uncertain tax positions	450	463
State tax credit carryforwards valuation allowances	1,499	1,349
Deferred compensation	14,886	21,617
Adjustment deferred tax assets non-cash tax charge	11,010
Reconciliation of the beginning and ending balances of the total amounts of unrecognized tax benefits
Unrecognized tax benefits at the beginning of the period	2,313	3,392	3,133
Increases in tax positions for the current year	285	510	393
Reductions in tax positions for lapse of statute of limitations	(484)	(1,589)	(134)
Unrecognized tax benefits at the end of the period	2,114	2,313	$ 3,392
Foreign Tax Authority
Effective income tax rate differs from the statutory rate
Foreign subsidiary valuation allowances for net operating loss carryforwards	$ 4,681	$ 5,012