PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment	$ 471,985,000		$ 471,985,000		$ 460,838,000
Less: accumulated depreciation	200,514,000		200,514,000		189,483,000
Property, plant and equipment, net	271,471,000		271,471,000		271,355,000
Impairment charges	6,146,000	$ 0	6,146,000	$ 0
Land
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment	11,901,000		11,901,000		11,415,000
Building
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment	94,638,000		94,638,000		90,644,000
Equipment
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment	287,765,000		287,765,000		278,851,000
Construction in progress
Property, Plant and Equipment [Abstract]
Gross property, plant and equipment	$ 77,681,000		$ 77,681,000		$ 79,928,000