FINANCING RECEIVABLES AND OPERATING LEASES (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Mar. 31, 2016
Mar. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]            
Reserve for credit losses $ (5,687) $ (5,528) $ (5,687) $ (5,528) $ (5,193) $ (5,623)
Reported as [Abstract]            
Current 78,616   78,616   56,448  
Estimated unguaranteed residual values for direct financing lease 9,958   9,958   6,722  
Accumulated amortization of initial direct cost 639   639   612  
Collateral for non-recourse notes payable - Finance receivables 61,200   61,200   36,100  
Collateral for non-recourse notes payable - Operating leases 3,500   3,500   13,900  
Gain on sale of financing receivables 1,700 2,500 3,200 4,000    
Proceeds from sale of financing receivables 75,400 84,400 129,600 108,700    
Investment in operating lease equipment - net [Abstract]            
Cost of equipment under operating lease 16,844   16,844   36,635  
Accumulated depreciation (9,863)   (9,863)   (18,897)  
Investment in operating lease equipment - net [1] 6,981   6,981   17,738  
Unguaranteed residual value of operating lease equipment net 1,171   1,171   3,417  
Maximum potential future payments related guarantees 1,100   1,100      
Notes Receivables [Member]            
Financing Receivable, Allowance for Credit Losses [Line Items]            
Minimum payments 53,930   53,930   44,442  
Estimated unguaranteed residual value 0 [2]   0 [2]   0 [3]  
Initial direct costs, net of amortization 407 [4]   407 [4]   312 [5]  
Unearned income 0   0   0  
Reserve for credit losses (3,557) [6] (3,584) (3,557) [6] (3,584) (3,381) [6] (3,573)
Total, net 50,780   50,780   41,373  
Reported as [Abstract]            
Current 32,203   32,203   24,962  
Long-term 18,577   18,577   16,411  
Total, net 50,780   50,780   41,373  
Lease-Related Receivables [Member]            
Financing Receivable, Allowance for Credit Losses [Line Items]            
Minimum payments 81,397   81,397   66,303  
Estimated unguaranteed residual value 18,603 [2]   18,603 [2]   12,693 [3]  
Initial direct costs, net of amortization 546 [4]   546 [4]   475 [5]  
Unearned income (6,627)   (6,627)   (5,543)  
Reserve for credit losses (958) [6] $ (848) (958) [6] $ (848) (685) [6] $ (881)
Total, net 92,961   92,961   73,243  
Reported as [Abstract]            
Current 46,413   46,413   31,486  
Long-term 46,548   46,548   41,757  
Total, net 92,961   92,961   73,243  
Financing Receivables [Member]            
Financing Receivable, Allowance for Credit Losses [Line Items]            
Minimum payments 135,327   135,327   110,745  
Estimated unguaranteed residual value 18,603 [2]   18,603 [2]   12,693 [3]  
Initial direct costs, net of amortization 953 [4]   953 [4]   787 [5]  
Unearned income (6,627)   (6,627)   (5,543)  
Reserve for credit losses [6] (4,515)   (4,515)   (4,066)  
Total, net 143,741   143,741   114,616  
Reported as [Abstract]            
Current 78,616   78,616   56,448  
Long-term 65,125   65,125   58,168  
Total, net $ 143,741   $ 143,741   $ 114,616  
[1] These totals include estimated unguaranteed residual values of $1,171 thousand and $3,417 thousand as of September 30, 2016 and March 31, 2016, respectively.
[2] Includes estimated unguaranteed residual values of $9,958 thousand for direct financing leases, which have been sold and accounted for as sales under ASC Topic, Transfers and Servicing.
[3] Includes estimated unguaranteed residual values of $6,722 thousand for direct financing leases which have been sold and accounted for as sales under ASC Topic, Transfers and Servicing.
[4] Initial direct costs are shown net of amortization of $639 thousand.
[5] Initial direct costs are shown net of amortization of $612 thousand.
[6] For details on reserve for credit losses, refer to Note 5, "Reserves for Credit Losses."