FINANCING RECEIVABLES AND OPERATING LEASES (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Sep. 30, 2016		Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015	Mar. 31, 2016		Mar. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Reserve for credit losses		$ (5,687)		$ (5,528)	$ (5,687)		$ (5,528)	$ (5,193)		$ (5,623)
Reported as [Abstract]
Current		78,616			78,616			56,448
Estimated unguaranteed residual values for direct financing lease		9,958			9,958			6,722
Accumulated amortization of initial direct cost		639			639			612
Collateral for non-recourse notes payable - Finance receivables		61,200			61,200			36,100
Collateral for non-recourse notes payable - Operating leases		3,500			3,500			13,900
Gain on sale of financing receivables		1,700		2,500	3,200		4,000
Proceeds from sale of financing receivables		75,400		84,400	129,600		108,700
Investment in operating lease equipment - net [Abstract]
Cost of equipment under operating lease		16,844			16,844			36,635
Accumulated depreciation		(9,863)			(9,863)			(18,897)
Investment in operating lease equipment - net	[1]	6,981			6,981			17,738
Unguaranteed residual value of operating lease equipment net		1,171			1,171			3,417
Maximum potential future payments related guarantees		1,100			1,100
Notes Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		53,930			53,930			44,442
Estimated unguaranteed residual value		0	[2]		0	[2]		0	[3]
Initial direct costs, net of amortization		407	[4]		407	[4]		312	[5]
Unearned income		0			0			0
Reserve for credit losses		(3,557)	[6]	(3,584)	(3,557)	[6]	(3,584)	(3,381)	[6]	(3,573)
Total, net		50,780			50,780			41,373
Reported as [Abstract]
Current		32,203			32,203			24,962
Long-term		18,577			18,577			16,411
Total, net		50,780			50,780			41,373
Lease-Related Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		81,397			81,397			66,303
Estimated unguaranteed residual value		18,603	[2]		18,603	[2]		12,693	[3]
Initial direct costs, net of amortization		546	[4]		546	[4]		475	[5]
Unearned income		(6,627)			(6,627)			(5,543)
Reserve for credit losses		(958)	[6]	$ (848)	(958)	[6]	$ (848)	(685)	[6]	$ (881)
Total, net		92,961			92,961			73,243
Reported as [Abstract]
Current		46,413			46,413			31,486
Long-term		46,548			46,548			41,757
Total, net		92,961			92,961			73,243
Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		135,327			135,327			110,745
Estimated unguaranteed residual value		18,603	[2]		18,603	[2]		12,693	[3]
Initial direct costs, net of amortization		953	[4]		953	[4]		787	[5]
Unearned income		(6,627)			(6,627)			(5,543)
Reserve for credit losses	[6]	(4,515)			(4,515)			(4,066)
Total, net		143,741			143,741			114,616
Reported as [Abstract]
Current		78,616			78,616			56,448
Long-term		65,125			65,125			58,168
Total, net		$ 143,741			$ 143,741			$ 114,616

[1] These totals include estimated unguaranteed residual values of $1,171 thousand and $3,417 thousand as of September 30, 2016 and March 31, 2016, respectively.

[2] Includes estimated unguaranteed residual values of $9,958 thousand for direct financing leases, which have been sold and accounted for as sales under ASC Topic, Transfers and Servicing.

[3] Includes estimated unguaranteed residual values of $6,722 thousand for direct financing leases which have been sold and accounted for as sales under ASC Topic, Transfers and Servicing.

[4] Initial direct costs are shown net of amortization of $639 thousand.

[5] Initial direct costs are shown net of amortization of $612 thousand.

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