Finance Receivables - Information regarding delinquency rates with respect to contracts and direct loans (Details 4) - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2016	Jun. 30, 2015
Contracts
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 484,027	$ 463,396
Total	$ 37,048	$ 25,577
Total (in percentage)	7.66%	5.52%
Contracts \| 31 - 60 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 25,445	$ 18,879
Total (in percentage)	5.26%	4.07%
Contracts \| 61 - 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 8,027	$ 4,799
Total (in percentage)	1.66%	1.04%
Contracts \| Over 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 3,576	$ 1,899
Total (in percentage)	0.74%	0.41%
Direct Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 11,062	$ 11,372
Total	$ 275	$ 215
Total (in percentage)	2.49%	1.89%
Direct Loans \| 31 - 60 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 178	$ 156
Total (in percentage)	1.61%	1.37%
Direct Loans \| 61 - 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 55	$ 35
Total (in percentage)	0.50%	0.31%
Direct Loans \| Over 90 days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Gross Balance Outstanding	$ 42	$ 24
Total (in percentage)	0.38%	0.21%