CONCENTRATION OF RISK - Revenues by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Concentration Risk [Line Items]
Revenues	$ 576,429	$ 616,619	$ 553,525
South Korea [Member]
Concentration Risk [Line Items]
Revenues	322,509	360,640	334,835
China [Member]
Concentration Risk [Line Items]
Revenues	229,727	230,582	192,079
Japan [Member]
Concentration Risk [Line Items]
Revenues	6,971	5,579	7,358
Other Non-U.S. Locations [Member]
Concentration Risk [Line Items]
Revenues	4,411	3,829	3,137
Total Non-U.S. Locations [Member]
Concentration Risk [Line Items]
Revenues	563,618	600,630	537,409
United States [Member]
Concentration Risk [Line Items]
Revenues	$ 12,811	$ 15,989	$ 16,116