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Revenue Recognition (Detail Textuals)
 3 Months Ended 9 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Deferred Revenue Disclosure [Abstract]        
Interest income accrual on finance receivables suspension condition     Accrual of interest income on finance receivables is suspended when a loan enters bankruptcy status, is contractually delinquent for 61 days or more or the collateral is repossessed, whichever is earlier. Chapter 13 bankruptcy accounts are accounted for under the cost-recovery method.  
Average dealer discount associated with new volume 6.87% 7.59% 7.00% 7.56%