INTANGIBLE ASSETS (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
Intangible assets subject to amortization
Gross Amount	$ 98,759		$ 98,759		$ 99,443
Accumulated amortization	(36,347)		(36,347)		(33,584)
Net Book Value	62,412		62,412		65,859
Amortization expense for intangible assets	1,511	$ 1,483	3,023	$ 2,924
Estimated amortization expense
Remainder of 2021	3,011		3,011
2022	6,073		6,073
2023	6,087		6,087
2024	5,759		5,759
2025	5,741		5,741
2026	5,729		5,729
Thereafter	30,012		30,012
Total estimated amortization expense	62,412		62,412
Customer lists
Intangible assets subject to amortization
Gross Amount	69,489		69,489		69,833
Accumulated amortization	(25,611)		(25,611)		(23,636)
Net Book Value	43,878		$ 43,878		46,197
Customer lists | Minimum
Intangible assets subject to amortization
Estimated Life			8 years
Customer lists | Maximum
Intangible assets subject to amortization
Estimated Life			17 years
Trade name
Intangible assets subject to amortization
Gross Amount	13,951		$ 13,951		14,055
Accumulated amortization	(5,497)		(5,497)		(5,061)
Net Book Value	8,454		$ 8,454		8,994
Trade name | Minimum
Intangible assets subject to amortization
Estimated Life			10 years
Trade name | Maximum
Intangible assets subject to amortization
Estimated Life			19 years
Design and technologies
Intangible assets subject to amortization
Gross Amount	15,295		$ 15,295		15,531
Accumulated amortization	(5,225)		(5,225)		(4,874)
Net Book Value	10,070		$ 10,070		10,657
Design and technologies | Minimum
Intangible assets subject to amortization
Estimated Life			10 years
Design and technologies | Maximum
Intangible assets subject to amortization
Estimated Life			15 years
Patents
Intangible assets subject to amortization
Estimated Life			17 years
Gross Amount	24		$ 24		24
Accumulated amortization	(14)		(14)		(13)
Net Book Value	$ 10		$ 10		$ 11