RESERVES FOR CREDIT LOSSES, CQR (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	$ 803	$ 1,221
Current	803	497
Unbilled minimum lease payments	66,087	56,154
Total minimum lease payments	67,693	57,872
Unearned income	(3,466)	(3,937)
Non-recourse notes payable	(26,545)	(26,277)
Net credit exposure	37,682	27,658
Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	1,080	4,720
Current	3,077	1,720
Unbilled minimum lease payments	42,322	42,084
Total minimum lease payments	46,479	48,524
Non-recourse notes payable	(28,326)	(25,735)
Net credit exposure	$ 18,153	22,789
High CQR [Member] | Minimum [Member]
Financing Receivable, Recorded Investment [Line Items]
Losses on net credit exposure	0.00%
High CQR [Member] | Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Losses on net credit exposure	5.00%
High CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	$ 576	833
Current	656	406
Unbilled minimum lease payments	46,126	32,532
Total minimum lease payments	47,358	33,771
Unearned income	(2,405)	(2,362)
Non-recourse notes payable	(17,893)	(12,924)
Net credit exposure	27,060	18,485
High CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	265	1,601
Current	1,635	1,165
Unbilled minimum lease payments	32,984	23,359
Total minimum lease payments	34,884	26,125
Non-recourse notes payable	(22,938)	(12,003)
Net credit exposure	$ 11,946	14,122
Average CQR [Member] | Minimum [Member]
Financing Receivable, Recorded Investment [Line Items]
Losses on net credit exposure	2.00%
Average CQR [Member] | Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Losses on net credit exposure	15.00%
Average CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	$ 227	246
Current	147	91
Unbilled minimum lease payments	19,961	23,622
Total minimum lease payments	20,335	23,959
Unearned income	(1,061)	(1,556)
Non-recourse notes payable	(8,652)	(13,353)
Net credit exposure	10,622	9,050
Average CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	750	33
Current	1,442	555
Unbilled minimum lease payments	9,338	18,725
Total minimum lease payments	11,530	19,313
Non-recourse notes payable	(5,388)	(13,732)
Net credit exposure	$ 6,142	5,581
Low CQR [Member] | Minimum [Member]
Financing Receivable, Recorded Investment [Line Items]
Losses on net credit exposure	15.00%
Low CQR [Member] | Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Losses on net credit exposure	100.00%
Low CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	$ 0	142
Current	0	0
Unbilled minimum lease payments	0	0
Total minimum lease payments	0	142
Unearned income	0	(19)
Non-recourse notes payable	0	0
Net credit exposure	0	123
Low CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	65	3,086
Current	0	0
Unbilled minimum lease payments	0	0
Total minimum lease payments	65	3,086
Non-recourse notes payable	0	0
Net credit exposure	65	3,086
31 to 60 Days Past Due [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	104	492
31 to 60 Days Past Due [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	859	211
31 to 60 Days Past Due [Member] | High CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	42	379
31 to 60 Days Past Due [Member] | High CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	122	183
31 to 60 Days Past Due [Member] | Average CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	62	113
31 to 60 Days Past Due [Member] | Average CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	737	28
31 to 60 Days Past Due [Member] | Low CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	0	0
31 to 60 Days Past Due [Member] | Low CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	0	0
61 to 90 Days Past Due [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	54	244
61 to 90 Days Past Due [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	145	668
61 to 90 Days Past Due [Member] | High CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	24	224
61 to 90 Days Past Due [Member] | High CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	141	663
61 to 90 Days Past Due [Member] | Average CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	30	20
61 to 90 Days Past Due [Member] | Average CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	4	5
61 to 90 Days Past Due [Member] | Low CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	0	0
61 to 90 Days Past Due [Member] | Low CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	0	0
Greater than 90 Days Past Due [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	645	485
Greater than 90 Days Past Due [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	76	3,841
Greater than 90 Days Past Due [Member] | High CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	510	230
Greater than 90 Days Past Due [Member] | High CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	2	755
Greater than 90 Days Past Due [Member] | Average CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	135	113
Greater than 90 Days Past Due [Member] | Average CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	9	0
Greater than 90 Days Past Due [Member] | Low CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	0	142
Greater than 90 Days Past Due [Member] | Low CQR [Member] | Notes Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total past due	$ 65	$ 3,086