INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 5,099	$ 6,422	$ 5,480
Federal - Deemed repatriation	0	0	(477)
State	96	53	(380)
Foreign	2,344	3,083	2,719
Current income tax expense	7,539	9,558	7,342
Deferred:
Federal	734	1,599	571
State	9	17	(55)
Foreign	(15)	100	59
Deferred income tax expense	728	1,716	575
Income tax expense	$ 8,267	$ 11,274	$ 7,917