INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 07, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Intangible assets subject to amortization
Gross Amount		$ 96,598		$ 89,487
Accumulated amortization		(28,311)		(26,990)
Net Book Value		68,287		62,497
Amortization expense for intangible assets		1,441	$ 1,432
Estimated amortization expense
Remainder of 2020		4,456
2021		5,905
2022		5,948
2023		5,949
2024		5,625
Thereafter		40,404
Total estimated amortization expense		68,287
Dynamic Controls
Intangible assets subject to amortization
Intangible assets		7,800
Customer lists
Intangible assets subject to amortization
Gross Amount		68,342		64,314
Accumulated amortization		(20,258)		(19,311)
Net Book Value		$ 48,084		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		$ 13,607		12,222
Accumulated amortization		(4,314)		(4,114)
Net Book Value		$ 9,293		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		$ 14,625		12,927
Accumulated amortization		(3,727)		(3,554)
Net Book Value		$ 10,898		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
Accumulated amortization		(12)		(11)
Net Book Value		$ 12		$ 13