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Fair Value Disclosures - Summary of financial instruments not measured at fair value (Details 1) - USD ($)
$ in Thousands
Sep. 30, 2016
Mar. 31, 2016
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash $ 3,799 $ 1,849
Finance receivables
Line of credit
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash
Finance receivables
Line of credit 209,000 211,000
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash
Finance receivables 312,727 311,837
Line of credit
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 3,799 1,849
Finance receivables 312,727 311,837
Line of credit 209,000 211,000
Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 3,799 1,849
Finance receivables 312,727 311,837
Line of credit $ 209,000 $ 211,000