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GOODWILL IMPAIRMENT - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Line Items]
Goodwill, gross	$ 312,820	$ 312,689	$ 317,691
Goodwill impairment loss	106,737
Goodwill, end of period	204,420	311,026	311,084
Tank Trailers Reporting Unit
Goodwill [Line Items]
Goodwill impairment loss	11,000
Final Mile Product Reporting Unit
Goodwill [Line Items]
Goodwill impairment loss	95,800
Commercial Trailer Products
Goodwill [Line Items]
Goodwill, gross	4,288	4,288	4,288
Goodwill impairment loss	0
Goodwill, end of period	2,625	2,625	2,625
Diversified Products
Goodwill [Line Items]
Goodwill, gross	140,817	140,686	145,688
Goodwill impairment loss	10,971
Goodwill, end of period	129,846	140,686	140,744
Final Mile Products
Goodwill [Line Items]
Goodwill, gross	167,715	167,715	167,715
Goodwill impairment loss	95,766
Goodwill, end of period	$ 71,949	$ 167,715	$ 167,715

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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