PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 343,341	$ 304,326
Less: Accumulated depreciation	126,482	113,407
Property, plant and equipment, net	216,859	190,919
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	11,588	7,965
Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	79,261	67,702
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	237,898	213,909
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 14,594	$ 14,750