GOODWILL AND INTANGIBLE ASSETS (Intangible Assets) (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2018	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	$ 149,560
Accumulated Amortization	10,402
Net Intangibles	139,158	$ 110,320
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	70,660
Accumulated Amortization	3,785
Net Intangibles	$ 66,875
Weighted Average Amortization Period (years)	10 years 9 months 18 days
Brand
Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	$ 49,500
Accumulated Amortization	3,143
Net Intangibles	$ 46,357
Weighted Average Amortization Period (years)	13 years 6 months
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	$ 14,410
Accumulated Amortization	189
Net Intangibles	$ 14,221
Weighted Average Amortization Period (years)	7 years 7 months 6 days
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	$ 2,100
Accumulated Amortization	92
Net Intangibles	$ 2,008
Weighted Average Amortization Period (years)	3 years 2 months 12 days
Software
Finite-Lived Intangible Assets [Line Items]
Gross Intangibles	$ 12,890
Accumulated Amortization	3,193
Net Intangibles	$ 9,697
Weighted Average Amortization Period (years)	3 years