RESERVES FOR CREDIT LOSSES, Disaggregated Based on Impairment (Details) - USD ($) $ in Thousands	Jun. 30, 2019		Mar. 31, 2019		Jun. 30, 2018	Mar. 31, 2018
Reserve for credit losses [Abstract]
Ending balance	$ 2,889		$ 2,614		$ 2,842	$ 2,664
Accounts Receivable [Member]
Reserve for credit losses [Abstract]
Ending balance	1,857		1,579		1,660	1,538
Notes Receivable [Member]
Reserve for credit losses [Abstract]
Ending balance: collectively evaluated for impairment	458		443
Ending balance: individually evaluated for impairment	62		62
Ending balance	520	[1]	505	[1]	486	486
Minimum payments [Abstract]
Ending balance: collectively evaluated for impairment	62,985		40,501
Ending balance: individually evaluated for impairment	89		62
Ending balance	63,074		40,563
Lease-Related Receivables [Member]
Reserve for credit losses [Abstract]
Ending balance: collectively evaluated for impairment	512		530
Ending balance: individually evaluated for impairment	0		0
Ending balance	512	[1]	530	[1]	$ 696	$ 640
Minimum payments [Abstract]
Ending balance: collectively evaluated for impairment	85,396		64,201
Ending balance: individually evaluated for impairment	0		0
Ending balance	$ 85,396		$ 64,201

[1] For details on reserve for credit losses, refer to Note 7, “Reserves for Credit Losses.”