BUSINESS SEGMENTS - Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 224,777	$ 224,750	$ 607,066	$ 519,960
Income from operations	21,680	21,506	41,927	557
Depreciation and amortization	5,837	6,090	17,560	18,385
Assets	809,807		809,807		$ 807,481
U.S.
Segment Reporting Information [Line Items]
Net sales	189,456	193,432	522,170	447,087
Operating segments | U.S.
Segment Reporting Information [Line Items]
Assets	694,138		694,138		661,321
Operating segments | International
Segment Reporting Information [Line Items]
Assets	106,924		106,924		110,222
Unallocated corporate expenses
Segment Reporting Information [Line Items]
Income from operations	(6,876)	(6,252)	(18,244)	(15,922)
Assets	8,745		8,745		$ 35,938
U.S. | Operating segments
Segment Reporting Information [Line Items]
Net sales	197,724	201,539	540,488	463,338
Income from operations	30,958	29,111	66,339	28,383
Depreciation and amortization	4,624	4,926	13,913	14,922
International | Operating segments
Segment Reporting Information [Line Items]
Net sales	27,053	23,211	66,578	56,622
Income from operations	(2,402)	(1,353)	(6,168)	(11,904)
Depreciation and amortization	$ 1,213	$ 1,164	$ 3,647	$ 3,463