ALLOWANCE FOR CREDIT LOSSES, Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2021		Mar. 31, 2021
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Billed	$ 13,783		$ 9,616
Unbilled	142,779		168,448
Total	156,562	[1]	178,064	[2]
Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Billed	9,761		5,471
Unbilled	94,305		107,170
Total	104,066		112,641
Lease Receivables [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Billed	4,022		4,145
Unbilled	48,474		61,278
Total	52,496		65,423
Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	4,566		3,810
Past Due [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	3,024		2,231
Past Due [Member] | Lease Receivables [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	1,542		1,579
31 to 60 Days Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	976		1,452
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	653		648
31 to 60 Days Past Due [Member] | Lease Receivables [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	323		804
61 to 90 Days Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	2,151		1,042
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	1,658		910
61 to 90 Days Past Due [Member] | Lease Receivables [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	493		132
> 90 Days Past Due [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	1,439		1,316
> 90 Days Past Due [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	713		673
> 90 Days Past Due [Member] | Lease Receivables [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	726		643
Current [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	9,217		5,806
Current [Member] | Notes Receivable [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	6,737		3,240
Current [Member] | Lease Receivables [Member]
Age of the Recorded Notes Receivable Balance Disaggregated Based on Internally Assigned CQR [Abstract]
Total	$ 2,480		$ 2,566

[1] Unguaranteed residual values of $8,081 thousand that we retained after selling the related lease receivable and initial direct costs of notes receivable of $271 thousand are excluded from amortized cost.

[2] Unguaranteed residual values of $9,453 thousand that we retained after selling the related lease receivable and initial direct costs of notes receivable of $425 thousand are excluded from amortized cost.