FINANCING RECEIVABLES AND OPERATING LEASES (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Sep. 30, 2017		Sep. 30, 2016	Sep. 30, 2017		Sep. 30, 2016	Mar. 31, 2017		Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Reserve for credit losses		$ (2,363)		$ (5,687)	$ (2,363)		$ (5,687)	$ (5,392)		$ (5,193)
Reported as [Abstract]
Current		69,932			69,932			51,656
Estimated unguaranteed residual values for direct financing lease		9,772			9,772			12,677
Accumulated amortization of initial direct cost		375			375			510
Collateral for non-recourse notes payable - Finance receivables		45,800			45,800			33,100
Collateral for non-recourse notes payable - Operating leases		6,700			6,700			6,600
Gain on sale of financing receivables		1,200		1,700	3,500		3,200
Proceeds from sale of financing receivables		48,300		75,400	134,100		129,600
Investment in operating lease equipment - net [Abstract]
Cost of equipment under operating leases		16,886			16,886			16,725
Accumulated depreciation		(8,949)			(8,949)			(8,449)
Investment in operating lease equipment - net	[1]	7,937			7,937			8,276
Unguaranteed residual value of operating lease equipment net		640			640			1,117
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		46,479			46,479			48,524
Estimated unguaranteed residual value		0	[2]		0	[2]		0	[3]
Initial direct costs, net of amortization		304	[4]		304	[4]		279	[5]
Unearned income		0			0			0
Reserve for credit losses		(441)	[6]	(3,557)	(441)	[6]	(3,557)	(3,434)	[6]	(3,381)
Total, net		46,342			46,342			45,369
Reported as [Abstract]
Current		27,238			27,238			23,780
Long-term		19,104			19,104			21,589
Total, net		46,342			46,342			45,369
Lease-Related Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		67,693			67,693			57,872
Estimated unguaranteed residual value		15,313	[2]		15,313	[2]		18,273	[3]
Initial direct costs, net of amortization		341	[4]		341	[4]		341	[5]
Unearned income		(5,199)			(5,199)			(5,913)
Reserve for credit losses		(648)	[6]	$ (958)	(648)	[6]	$ (958)	(679)	[6]	$ (685)
Total, net		77,500			77,500			69,894
Reported as [Abstract]
Current		42,694			42,694			27,876
Long-term		34,806			34,806			42,018
Total, net		77,500			77,500			69,894
Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		114,172			114,172			106,396
Estimated unguaranteed residual value		15,313	[2]		15,313	[2]		18,273	[3]
Initial direct costs, net of amortization		645	[4]		645	[4]		620	[5]
Unearned income		(5,199)			(5,199)			(5,913)
Reserve for credit losses	[6]	(1,089)			(1,089)			(4,113)
Total, net		123,842			123,842			115,263
Reported as [Abstract]
Current		69,932			69,932			51,656
Long-term		53,910			53,910			63,607
Total, net		$ 123,842			$ 123,842			$ 115,263

[1] These totals include estimated unguaranteed residual values of $640 thousand and $1,117 thousand as of September 30, 2017 and March 31, 2017, respectively.

[2] Includes estimated unguaranteed residual values of $9,772 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 $375 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."