GOODWILL AND INTANGIBLE ASSETS - Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Balance, beginning of period	$ 281,734	$ 208,044
Acquisitions	21,488	73,842
Adjustment to prior year preliminary purchase price allocation	16,127	(152)
Balance, end of period	319,349	281,734
Manufacturing
Goodwill [Line Items]
Accumulated impairment	27,400	27,400
Goodwill [Roll Forward]
Balance, beginning of period	235,345	179,471
Acquisitions	21,488	56,704
Adjustment to prior year preliminary purchase price allocation	11,569	(830)
Balance, end of period	268,402	235,345
Distribution
Goodwill [Roll Forward]
Balance, beginning of period	46,389	28,573
Acquisitions	0	17,138
Adjustment to prior year preliminary purchase price allocation	4,558	678
Balance, end of period	$ 50,947	$ 46,389