ACCUMULATED OTHER COMPREHENSIVE INCOME - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net foreign currency translation adjustment	$ (4,799)	$ (11,255)	$ 12,829
Unrealized gain/(loss) on cash flow hedge	3,564	2,707	(3,094)
Tax	(868)	(654)	809
Net of tax	2,696	2,053	(2,285)
Net change in postretirement benefit plan (see Note 15 for further information)
Prior service credit and gain arising during the period	(41)	(4)	(503)
Amortization of prior service credit	9	74	74
Amortization of loss	(2)	(21)	(50)
Total before tax	(34)	49	(479)
Tax	(24)	(13)	127
Adjustment	0	0	(455)
Net of tax	(58)	36	(807)
Other comprehensive (loss)/ income, net of tax	(2,161)	(9,166)	9,737
Currency swap
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net foreign currency translation adjustment	3,851	4,766	(4,882)
Net change in postretirement benefit plan (see Note 15 for further information)
Net foreign currency translation adjustment tax	$ (1,236)	$ (1,527)	$ 1,579