RESERVES FOR CREDIT LOSSES, CQR (Details) - USD ($) $ in Thousands	Jun. 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	$ 1,080	$ 467
Current	491	668
Unbilled minimum lease payments	83,825	63,066
Total minimum lease payments	85,396	64,201
Unearned income	(8,060)	(5,307)
Non-recourse notes payable	(39,770)	(31,892)
Net credit exposure	37,566	27,002
Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total past due	272	1,268
Current	7,848	3,950
Unbilled minimum lease payments	54,954	35,345
Total minimum lease payments	63,074	40,563
Non-recourse notes payable	(30,011)	(19,752)
Net credit exposure	$ 33,063	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	$ 1,008	376
Current	239	543
Unbilled minimum lease payments	38,379	29,503
Total minimum lease payments	39,626	30,422
Unearned income	(4,362)	(2,799)
Non-recourse notes payable	(13,800)	(11,044)
Net credit exposure	21,464	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	129	1,060
Current	7,361	3,813
Unbilled minimum lease payments	48,240	28,113
Total minimum lease payments	55,730	32,986
Non-recourse notes payable	(29,962)	(18,245)
Net credit exposure	$ 25,768	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	$ 72	91
Current	252	125
Unbilled minimum lease payments	45,446	33,563
Total minimum lease payments	45,770	33,779
Unearned income	(3,698)	(2,508)
Non-recourse notes payable	(25,970)	(20,848)
Net credit exposure	16,102	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	54	146
Current	487	137
Unbilled minimum lease payments	6,714	7,232
Total minimum lease payments	7,255	7,515
Non-recourse notes payable	(49)	(1,507)
Net credit exposure	$ 7,206	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	307	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	27	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	275	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	0	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	32	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	27	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	216	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	50	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	205	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	23	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	11	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	27	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	557	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	195	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	528	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	106	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	29	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	0	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