BUSINESS SEGMENTS - Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 186,636	$ 150,140	$ 382,289	$ 295,210
Income (loss) from operations	11,001	4,296	20,247	(20,949)
Depreciation and amortization	5,765	6,061	11,723	12,295
Assets	759,562		759,562		$ 807,481
U.S.
Segment Reporting Information [Line Items]
Net sales	161,946	128,928	332,714	253,655
Operating segments | U.S.
Segment Reporting Information [Line Items]
Assets	621,277		621,277		661,321
Operating segments | International
Segment Reporting Information [Line Items]
Assets	103,200		103,200		110,222
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Income (loss) from operations	(5,657)	(5,039)	(11,368)	(9,670)
Assets	35,085		35,085		$ 35,938
U.S. | Operating segments
Segment Reporting Information [Line Items]
Net sales	166,583	132,591	342,764	261,799
Income (loss) from operations	18,274	13,152	35,381	(728)
Depreciation and amortization	4,539	4,934	9,289	9,996
International | Operating segments
Segment Reporting Information [Line Items]
Net sales	20,053	17,549	39,525	33,411
Income (loss) from operations	(1,616)	(3,817)	(3,766)	(10,551)
Depreciation and amortization	$ 1,226	$ 1,127	$ 2,434	$ 2,299