FINANCING RECEIVABLES AND OPERATING LEASES (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2017		Dec. 31, 2016	Mar. 31, 2017		Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Reserve for credit losses		$ (2,516)		$ (5,610)	$ (2,516)		$ (5,610)	$ (5,392)		$ (5,193)
Reported as [Abstract]
Current		74,598			74,598			51,656
Estimated unguaranteed residual values for direct financing lease		7,753			7,753			12,677
Accumulated amortization of initial direct cost		334			334			510
Investment in operating lease equipment - net [Abstract]
Cost of equipment under operating leases		16,804			16,804			16,725
Accumulated depreciation		(9,039)			(9,039)			(8,449)
Investment in operating lease equipment - net	[1]	7,765			7,765			8,276
Unguaranteed residual value of operating lease equipment net		2,077			2,077			1,117
Collateral for non-recourse notes payable - Finance receivables		37,200			37,200			33,100
Collateral for non-recourse notes payable - Operating leases		5,900			5,900			6,600
Gain on sale of financing receivables		1,200		900	4,600		4,100
Proceeds from sale of financing receivables		32,800		55,800	166,900		185,400
Deferred revenue		500			500			500
Maximum potential future payments related guarantees		600			600
Notes Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		59,444			59,444			48,524
Estimated unguaranteed residual value		0	[2]		0	[2]		0	[3]
Initial direct costs, net of amortization		369	[4]		369	[4]		279	[5]
Unearned income		0			0			0
Reserve for credit losses		(451)	[6]	(3,508)	(451)	[6]	(3,508)	(3,434)	[6]	(3,381)
Total, net		59,362			59,362			45,369
Reported as [Abstract]
Current		33,109			33,109			23,780
Long-term		26,253			26,253			21,589
Total, net		59,362			59,362			45,369
Lease-Related Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		73,022			73,022			57,872
Estimated unguaranteed residual value		13,358	[2]		13,358	[2]		18,273	[3]
Initial direct costs, net of amortization		321	[4]		321	[4]		341	[5]
Unearned income		(6,034)			(6,034)			(5,913)
Reserve for credit losses		(621)	[6]	$ (778)	(621)	[6]	$ (778)	(679)	[6]	$ (685)
Total, net		80,046			80,046			69,894
Reported as [Abstract]
Current		41,489			41,489			27,876
Long-term		38,557			38,557			42,018
Total, net		80,046			80,046			69,894
Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		132,466			132,466			106,396
Estimated unguaranteed residual value		13,358	[2]		13,358	[2]		18,273	[3]
Initial direct costs, net of amortization		690	[4]		690	[4]		620	[5]
Unearned income		(6,034)			(6,034)			(5,913)
Reserve for credit losses	[6]	(1,072)			(1,072)			(4,113)
Total, net		139,408			139,408			115,263
Reported as [Abstract]
Current		74,598			74,598			51,656
Long-term		64,810			64,810			63,607
Total, net		$ 139,408			$ 139,408			$ 115,263

[1] These totals include estimated unguaranteed residual values of $2,077 thousand and $1,117 thousand as of December 31, 2017 and March 31, 2017, respectively.

[2] Includes estimated unguaranteed residual values of $7,753 thousand for direct financing leases, which have been sold and accounted for as sales.

[3] Includes estimated unguaranteed residual values of $12,677 thousand for direct financing leases which have been sold and accounted for as sales.

[4] Initial direct costs are shown net of amortization of $334 thousand.

[5] Initial direct costs are shown net of amortization of $510 thousand.

[6] For details on reserve for credit losses, refer to Note 5, "Reserves for Credit Losses."