Finance Receivables - Information regarding delinquency rates with respect to contracts and direct loans (Details 5) - Finance receivables - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Balance Outstanding	$ 498,031	$ 482,864	$ 443,083
Total	$ 50,035	$ 26,901	$ 18,459
Total (in percentage)	10.05%	5.57%	4.17%
Direct Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross Balance Outstanding	$ 10,628	$ 10,978	$ 10,912
Total	$ 413	$ 240	$ 179
Total (in percentage)	3.89%	2.19%	1.64%
31 - 60 days | Contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 25,450	$ 17,466	$ 13,694
Total (in percentage)	5.11%	3.61%	3.09%
31 - 60 days | Direct Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 191	$ 161	$ 122
Total (in percentage)	1.80%	1.47%	1.12%
61 - 90 days | Contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 12,388	$ 6,069	$ 3,435
Total (in percentage)	2.49%	1.26%	0.78%
61 - 90 days | Direct Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 67	$ 41	$ 42
Total (in percentage)	0.63%	0.37%	0.38%
Over 90 days | Contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 12,197	$ 3,366	$ 1,330
Total (in percentage)	2.45%	0.70%	0.30%
Over 90 days | Direct Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 155	$ 38	$ 15
Total (in percentage)	1.46%	0.35%	0.14%