GOODWILL AND OTHER INTANGIBLE ASSETS (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) Unit	Dec. 31, 2016 USD ($)	Mar. 31, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance			$ 57,070	$ 50,824
Goodwill, Accumulated Amortization / Impairment Loss, Beginning Balance			(8,673)	(8,673)
Goodwill, Net Carrying Amount, Beginning Balance			48,397	42,151
Acquisitions			27,996	7,636
Foreign currency translations			153	(315)
Goodwill, Ending Balance	$ 85,219	$ 58,145	85,219	58,145
Goodwill, Accumulated Amortization / Impairment Loss, Ending Balance	(8,673)	(8,673)	(8,673)	(8,673)
Goodwill, Net Carrying Amount, Ending Balance	$ 76,546	$ 49,472	$ 76,546	49,472
Number of reporting units | Unit			1
Percentage change in the fair value	10.00%	10.00%
Finite-Lived Intangible Assets [Line Items]
Intangibles assets, Gross carrying amount	$ 46,685		$ 46,685		$ 27,022
Intangibles Assets, Accumulated amortization	(19,271)		(19,271)		(14,863)
Intangible assets, Net Carrying Amount	27,414		27,414		12,159
Foreign exchange transactions			200
Capitalized software development costs			200
Total amortization expense for other intangible assets	1,900	$ 1,100	4,200	$ 3,400
Customer Relationships and Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Intangibles assets, Gross carrying amount	41,777		41,777		23,373
Intangibles Assets, Accumulated amortization	(16,792)		(16,792)		(12,553)
Intangible assets, Net Carrying Amount	24,985		24,985		10,820
Increase in intangible assets due to business acquisitions			18,100
Internally Developed Processes [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired			2,400
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired			$ 15,700
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			3 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			8 years
Capitalized Software Development [Member]
Finite-Lived Intangible Assets [Line Items]
Intangibles assets, Gross carrying amount	4,908		$ 4,908		3,649
Intangibles Assets, Accumulated amortization	(2,479)		(2,479)		(2,310)
Intangible assets, Net Carrying Amount	$ 2,429		$ 2,429		$ 1,339
Capitalized Software Development [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			3 years
Capitalized Software Development [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			8 years
Trade Names and Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			10 years