RESERVES FOR CREDIT LOSSES, CQR (Details) - USD ($) $ in Thousands	Dec. 31, 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	$ 1,676	$ 467
Current	1,106	668
Unbilled minimum lease payments	78,668	63,066
Total minimum lease payments	81,450	64,201
Unearned income	(7,001)	(5,307)
Non-recourse notes payable	(45,170)	(31,892)
Net credit exposure	29,279	27,002
Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	1,258	1,268
Current	2,020	3,950
Unbilled minimum lease payments	56,956	35,345
Total minimum lease payments	60,234	40,563
Non-recourse notes payable	(26,630)	(19,752)
Net credit exposure	$ 33,604	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	$ 1,269	376
Current	390	543
Unbilled minimum lease payments	49,887	29,503
Total minimum lease payments	51,546	30,422
Unearned income	(4,890)	(2,799)
Non-recourse notes payable	(31,698)	(11,044)
Net credit exposure	14,958	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	867	1,060
Current	1,422	3,813
Unbilled minimum lease payments	42,648	28,113
Total minimum lease payments	44,937	32,986
Non-recourse notes payable	(20,323)	(18,245)
Net credit exposure	$ 24,614	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	$ 407	91
Current	716	125
Unbilled minimum lease payments	28,781	33,563
Total minimum lease payments	29,904	33,779
Unearned income	(2,111)	(2,508)
Non-recourse notes payable	(13,472)	(20,848)
Net credit exposure	14,321	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	272	146
Current	246	137
Unbilled minimum lease payments	14,690	7,232
Total minimum lease payments	15,208	7,515
Non-recourse notes payable	(6,307)	(1,507)
Net credit exposure	$ 8,901	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	119	62
Current	352	0
Unbilled minimum lease payments	(382)	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	1,010	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	786	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	695	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	578	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	315	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	118	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	90	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	340	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	78	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	322	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	49	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	18	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	29	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	326	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	394	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	252	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	240	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	74	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	125	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	$ 29	$ 62