FINANCING RECEIVABLES AND OPERATING LEASES (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2016		Dec. 31, 2015	Mar. 31, 2016		Mar. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Reserve for credit losses		$ (5,610)		$ (5,473)	$ (5,610)		$ (5,473)	$ (5,193)		$ (5,623)
Reported as [Abstract]
Current		65,945			65,945			56,448
Estimated unguaranteed residual values for direct financing lease		11,932			11,932			6,722
Accumulated amortization of initial direct cost		665			665			612
Collateral for non-recourse notes payable - Finance receivables		54,900			54,900			36,100
Collateral for non-recourse notes payable - Operating leases		6,700			6,700			13,900
Gain on sale of financing receivables		900		1,400	4,100		5,400
Proceeds from sale of financing receivables		55,800		54,100	185,400		162,700
Investment in operating lease equipment - net [Abstract]
Cost of equipment under operating lease		17,062			17,062			36,635
Accumulated depreciation		(8,886)			(8,886)			(18,897)
Investment in operating lease equipment - net	[1]	8,176			8,176			17,738
Unguaranteed residual value of operating lease equipment net		928			928			3,417
Maximum potential future payments related guarantees		1,200			1,200
Notes Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		53,167			53,167			44,442
Estimated unguaranteed residual value		0	[2]		0	[2]		0	[3]
Initial direct costs, net of amortization		465	[4]		465	[4]		312	[5]
Unearned income		0			0			0
Reserve for credit losses		(3,508)	[6]	(3,580)	(3,508)	[6]	(3,580)	(3,381)	[6]	(3,573)
Total, net		50,124			50,124			41,373
Reported as [Abstract]
Current		32,269			32,269			24,962
Long-term		17,855			17,855			16,411
Total, net		50,124			50,124			41,373
Lease-Related Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		71,343			71,343			66,303
Estimated unguaranteed residual value		18,069	[2]		18,069	[2]		12,693	[3]
Initial direct costs, net of amortization		518	[4]		518	[4]		475	[5]
Unearned income		(7,017)			(7,017)			(5,543)
Reserve for credit losses		(778)	[6]	$ (831)	(778)	[6]	$ (831)	(685)	[6]	$ (881)
Total, net		82,135			82,135			73,243
Reported as [Abstract]
Current		33,676			33,676			31,486
Long-term		48,459			48,459			41,757
Total, net		82,135			82,135			73,243
Financing Receivables [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Minimum payments		124,510			124,510			110,745
Estimated unguaranteed residual value		18,069	[2]		18,069	[2]		12,693	[3]
Initial direct costs, net of amortization		983	[4]		983	[4]		787	[5]
Unearned income		(7,017)			(7,017)			(5,543)
Reserve for credit losses	[6]	(4,286)			(4,286)			(4,066)
Total, net		132,259			132,259			114,616
Reported as [Abstract]
Current		65,945			65,945			56,448
Long-term		66,314			66,314			58,168
Total, net		$ 132,259			$ 132,259			$ 114,616

[1] These totals include estimated unguaranteed residual values of $928 thousand and $3,417 thousand as of December 31, 2016 and March 31, 2016, respectively.

[2] Includes estimated unguaranteed residual values of $11,932 thousand for direct financing leases, which have been sold and accounted for as sales.

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

[4] Initial direct costs are shown net of amortization of $665 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."