INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Mar. 07, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Intangible assets subject to amortization
Gross Amount		$ 97,291		$ 97,291		$ 89,487
Accumulated amortization		(29,913)		(29,913)		(26,990)
Net Book Value		67,378		67,378		62,497
Amortization expense for intangible assets		1,483	$ 1,430	2,924	$ 2,862
Estimated amortization expense
Remainder of 2020		2,976		2,976
2021		5,945		5,945
2022		5,990		5,990
2023		5,996		5,996
2024		5,670		5,670
Thereafter		40,801		40,801
Total estimated amortization expense		67,378		67,378
Dynamic Controls
Intangible assets subject to amortization
Intangible assets	$ 7,800	7,800		7,800
Customer lists
Intangible assets subject to amortization
Gross Amount		68,698		68,698		64,314
Accumulated amortization		(21,315)		(21,315)		(19,311)
Net Book Value		47,383		$ 47,383		45,003
Customer lists | Dynamic Controls
Intangible assets subject to amortization
Estimated Life	16 years
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		13,733		$ 13,733		12,222
Accumulated amortization		(4,549)		(4,549)		(4,114)
Net Book Value		9,184		$ 9,184		8,108
Trade name | Dynamic Controls
Intangible assets subject to amortization
Estimated Life	18 years
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		14,836		$ 14,836		12,927
Accumulated amortization		(4,037)		(4,037)		(3,554)
Net Book Value		10,799		$ 10,799		9,373
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		(12)		(12)		(11)
Net Book Value		$ 12		$ 12		$ 13