RESERVES FOR CREDIT LOSSES, CQR (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	$ 835	$ 467
Current	473	668
Unbilled minimum lease payments	86,681	63,066
Total minimum lease payments	87,989	64,201
Unearned income	(7,653)	(5,307)
Non-recourse notes payable	(34,604)	(31,892)
Net credit exposure	45,732	27,002
Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	1,832	1,268
Current	2,750	3,950
Unbilled minimum lease payments	73,901	35,345
Total minimum lease payments	78,483	40,563
Non-recourse notes payable	(45,131)	(19,752)
Net credit exposure	$ 33,352	20,811
High CQR [Member] | Minimum [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Losses on net credit exposure	0.00%
High CQR [Member] | Maximum [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Losses on net credit exposure	5.00%
High CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	$ 693	376
Current	190	543
Unbilled minimum lease payments	56,065	29,503
Total minimum lease payments	56,948	30,422
Unearned income	(5,285)	(2,799)
Non-recourse notes payable	(24,765)	(11,044)
Net credit exposure	26,898	16,579
High CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	1,624	1,060
Current	2,066	3,813
Unbilled minimum lease payments	65,225	28,113
Total minimum lease payments	68,915	32,986
Non-recourse notes payable	(44,447)	(18,245)
Net credit exposure	$ 24,468	14,741
Average CQR [Member] | Minimum [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Losses on net credit exposure	2.00%
Average CQR [Member] | Maximum [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Losses on net credit exposure	15.00%
Average CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	$ 142	91
Current	283	125
Unbilled minimum lease payments	30,616	33,563
Total minimum lease payments	31,041	33,779
Unearned income	(2,368)	(2,508)
Non-recourse notes payable	(9,839)	(20,848)
Net credit exposure	18,834	10,423
Average CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	119	146
Current	684	137
Unbilled minimum lease payments	8,676	7,232
Total minimum lease payments	9,479	7,515
Non-recourse notes payable	(684)	(1,507)
Net credit exposure	$ 8,795	6,008
Low CQR [Member] | Minimum [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Losses on net credit exposure	15.00%
Low CQR [Member] | Maximum [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Losses on net credit exposure	100.00%
Low CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	$ 0	0
Current	0	0
Unbilled minimum lease payments	0	0
Total minimum lease payments	0	0
Unearned income	0	0
Non-recourse notes payable	0	0
Net credit exposure	0	0
Low CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	89	62
Current	0	0
Unbilled minimum lease payments	0	0
Total minimum lease payments	89	62
Non-recourse notes payable	0	0
Net credit exposure	89	62
31 to 60 Days Past Due [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	278	347
31 to 60 Days Past Due [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	175	1,095
31 to 60 Days Past Due [Member] | High CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	213	325
31 to 60 Days Past Due [Member] | High CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	105	990
31 to 60 Days Past Due [Member] | Average CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	65	22
31 to 60 Days Past Due [Member] | Average CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	70	105
31 to 60 Days Past Due [Member] | Low CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	0	0
31 to 60 Days Past Due [Member] | Low CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
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]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	390	95
61 to 90 Days Past Due [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	1,405	74
61 to 90 Days Past Due [Member] | High CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	354	41
61 to 90 Days Past Due [Member] | High CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	1,367	40
61 to 90 Days Past Due [Member] | Average CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	36	54
61 to 90 Days Past Due [Member] | Average CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	38	34
61 to 90 Days Past Due [Member] | Low CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	0	0
61 to 90 Days Past Due [Member] | Low CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
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]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	167	25
Greater than 90 Days Past Due [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	252	99
Greater than 90 Days Past Due [Member] | High CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	126	10
Greater than 90 Days Past Due [Member] | High CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	152	30
Greater than 90 Days Past Due [Member] | Average CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	41	15
Greater than 90 Days Past Due [Member] | Average CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	11	7
Greater than 90 Days Past Due [Member] | Low CQR [Member] | Investment in Direct Financing and Sales-type Leases that are Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	0	0
Greater than 90 Days Past Due [Member] | Low CQR [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	$ 89	$ 62