Finance Receivables - Assessment of credit quality by creditworthiness (Details 4) - Finance receivables - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 482,864	$ 443,083	$ 410,532
Finance receivables, gross contract	487,118	447,043
Contracts \| Performing accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	473,429	438,318
Contracts \| Non-performing accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	9,435	4,765
Contracts \| Chapter 13 bankrupt accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,254	3,960
Direct Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	10,978	10,912	$ 10,705
Finance receivables, gross contract	11,012	10,932
Direct Loans \| Performing accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	10,899	10,855
Direct Loans \| Non-performing accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	79	57
Direct Loans \| Chapter 13 bankrupt accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 34	$ 20