BASIS OF PRESENTATION, CONSOLIDATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Finite-lived Intangible Assets [Roll Forward]
Intangible assets - beginning balance			$ 27,686
Foreign currency translation			(346)
Intangible assets - ending balance	$ 27,340		27,340
Accumulated amortization of intangible assets - beginning balance			(22,388)
Impairment of intangible assets	(3,005)	$ 0	(3,005)	$ 0
Amortization expense			(422)
Accumulated amortization of intangible assets - ending balance	(25,815)		$ (25,815)
Weighted average remaining contractual life, in years			5 years 5 months
Customer contracts
Finite-lived Intangible Assets [Roll Forward]
Intangible assets - beginning balance			$ 8,169
Foreign currency translation			0
Intangible assets - ending balance	8,169		8,169
Accumulated amortization of intangible assets - beginning balance			(8,169)
Impairment of intangible assets			0
Amortization expense			0
Accumulated amortization of intangible assets - ending balance	(8,169)		$ (8,169)
Weighted average remaining contractual life, in years			0 years
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Intangible assets - beginning balance			$ 12,777
Foreign currency translation			(78)
Intangible assets - ending balance	12,699		12,699
Accumulated amortization of intangible assets - beginning balance			(11,372)
Impairment of intangible assets			0
Amortization expense			(143)
Accumulated amortization of intangible assets - ending balance	(11,515)		$ (11,515)
Weighted average remaining contractual life, in years			4 years 1 month
Trade name and trademarks
Finite-lived Intangible Assets [Roll Forward]
Intangible assets - beginning balance			$ 4,878
Foreign currency translation			(253)
Intangible assets - ending balance	4,625		4,625
Accumulated amortization of intangible assets - beginning balance			(1,213)
Impairment of intangible assets			(2,933)
Amortization expense			(142)
Accumulated amortization of intangible assets - ending balance	(4,288)		$ (4,288)
Weighted average remaining contractual life, in years			1 year 2 months
Internally developed software
Finite-lived Intangible Assets [Roll Forward]
Intangible assets - beginning balance			$ 1,107
Foreign currency translation			(14)
Intangible assets - ending balance	1,093		1,093
Accumulated amortization of intangible assets - beginning balance			(915)
Impairment of intangible assets			(72)
Amortization expense			(107)
Accumulated amortization of intangible assets - ending balance	(1,094)		$ (1,094)
Weighted average remaining contractual life, in years			0 years
Licenses
Finite-lived Intangible Assets [Roll Forward]
Intangible assets - beginning balance			$ 755
Foreign currency translation			(1)
Intangible assets - ending balance	754		754
Accumulated amortization of intangible assets - beginning balance			(719)
Impairment of intangible assets			0
Amortization expense			(30)
Accumulated amortization of intangible assets - ending balance	$ (749)		$ (749)
Weighted average remaining contractual life, in years			1 month