INCOME TAXES - Effective tax rate - (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
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)	2.30%	2.40%	2.10%
Foreign income tax rates (as a percent)	1.00%	0.20%	1.00%
Income tax credits and adjustments (as a percent)	(0.80%)	(0.60%)	(1.40%)
Adjustment of deferred tax balances (as a percent)	(0.70%)	0.60%	(0.20%)
Reserve for uncertain tax benefits (as a percent)	0.30%		(0.80%)
Other, net (as a percent)	(0.40%)	0.20%	1.00%
Effective income tax rate (as a percent)	22.70%	23.80%	22.70%
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2026	$ 270
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2027	57
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2028	171
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2029	98
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2030	296
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2031	394
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2032	297
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2033	120
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2034	415
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2035	524
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2036	761
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2037	388
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2038	186
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2039	151
Tax benefits of foreign subsidiary tax loss carry forwards expiring in 2040	369
Unrecognized tax benefits	3,392	$ 3,133	$ 3,011
Portion of unrecognized tax benefits that, if recognized, would favorably affect annual effective income tax rate	1,734	1,547
Interest and penalties included in liability for uncertain tax positions	355	282
Reconciliation of the beginning and ending balances of the total amounts of unrecognized tax benefits
Unrecognized tax benefits at the beginning of the period	3,133	3,011	3,678
Increases in tax positions for the current year	393	700	377
Reductions in tax positions for lapse of statute of limitations	(134)	(578)	(501)
Reductions in tax positions for settlements and payments			(308)
Increases (decreases) in prior period unrecognized tax benefits due to change in judgment			(235)
Unrecognized tax benefits at the end of the period	$ 3,392	$ 3,133	$ 3,011