Finance Receivables - Information regarding delinquency rates with respect to contracts and direct loans (Details 5) - USD ($) $ in Thousands	6 Months Ended
Sep. 30, 2016	Sep. 30, 2015
Contracts
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 484,479	$ 475,089
Total	$ 47,291	$ 27,924
Total (in percentage)	9.76%	5.88%
Contracts \| 31 - 60 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 29,327	$ 19,746
Total (in percentage)	6.05%	4.16%
Contracts \| 61 - 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 10,654	$ 5,603
Total (in percentage)	2.20%	1.18%
Contracts \| Over 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 7,310	$ 2,575
Total (in percentage)	1.51%	0.54%
Direct Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 11,088	$ 11,673
Total	$ 454	$ 210
Total (in percentage)	4.09%	1.80%
Direct Loans \| 31 - 60 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 296	$ 156
Total (in percentage)	2.67%	1.34%
Direct Loans \| 61 - 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 87	$ 28
Total (in percentage)	0.78%	0.24%
Direct Loans \| Over 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 71	$ 26
Total (in percentage)	0.64%	0.22%