ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Changes in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated other comprehensive income (loss)
Beginning balances	$ 624,324	$ 601,931
Ending balances	631,238	612,703
Foreign Currency Translation
Accumulated other comprehensive income (loss)
Beginning balances	(9,375)	(7,870)
Other comprehensive income before reclassifications, net of tax	1,469	1,439
Other comprehensive income, net	1,469	1,439
Ending balances	(7,906)	(6,431)
Unrealized Gain (Loss) on Interest Rate Hedge
Accumulated other comprehensive income (loss)
Beginning balances	5,181	(6,788)
Other comprehensive income before reclassifications, net of tax	12,746	8,323
Amounts reclassified out of AOCI, net of tax	508	894
Other comprehensive income, net	13,254	9,217
Ending balances	18,435	2,429
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss)
Beginning balances	(4,194)	(14,658)
Other comprehensive income before reclassifications, net of tax	14,215	9,762
Amounts reclassified out of AOCI, net of tax	508	894
Other comprehensive income, net	14,723	10,656
Ending balances	$ 10,529	$ (4,002)