Finance Receivables - Reconciliation of changes in allowance for credit losses on direct loans (Details 2) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Current period provision	$ 7,599,189	$ 5,796,648	$ 18,765,745	$ 15,182,698
Finance receivables | Direct Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	779,921	734,500	702,789	590,278
Current period provision	161,667	137,953	363,534	382,916
Losses absorbed	(83,454)	(82,948)	(223,740)	(202,063)
Recoveries	1,432	3,403	16,983	21,777
Balance at end of period	$ 859,566	$ 792,908	$ 859,566	$ 792,908