GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2019	Mar. 31, 2019
Intangible Assets [Line Items]
Ending Gross Amount	$ 79,499	$ 76,472
Accumulated Amortization	(41,040)	(38,014)
Trade names and trademarks not being amortized
Intangible Assets [Line Items]
Ending Gross Amount	$ 12,013	12,008
Patents
Intangible Assets [Line Items]
Wtd Avg Life (Years)	11 years
Ending Gross Amount	$ 9,634	9,835
Accumulated Amortization	$ (6,532)	(6,316)
Customer lists and amortized trademarks
Intangible Assets [Line Items]
Wtd Avg Life (Years)	12 years
Ending Gross Amount	$ 62,965	60,065
Accumulated Amortization	$ (30,874)	(28,622)
Non-compete agreements
Intangible Assets [Line Items]
Wtd Avg Life (Years)	5 years
Ending Gross Amount	$ 1,766	1,764
Accumulated Amortization	$ (1,336)	(1,066)
Other
Intangible Assets [Line Items]
Wtd Avg Life (Years)	8 years
Ending Gross Amount	$ 5,134	4,808
Accumulated Amortization	$ (2,298)	$ (2,010)