INCOME TAXES - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 6,422	$ 5,480	$ 4,871
Current federal deemed repatriation		(477)	1,102
State	53	(380)	(1,435)
Foreign	3,083	2,719	3,653
Current income tax expense	9,558	7,342	8,191
Deferred:
Federal	1,599	571	(919)
State	17	(55)	150
Foreign	100	59	(99)
Deferred income tax expense	1,716	575	(868)
Income tax expense	$ 11,274	$ 7,917	$ 7,323