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Fair Value Disclosures - Summary of financial instruments not measured at fair value (Details 1) - USD ($)
$ in Thousands
Jun. 30, 2016
Mar. 31, 2016
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash $ 4,520 $ 1,849
Finance receivables 0
Line of credit 0
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 0
Finance receivables 0
Line of credit 209,000 211,000
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 0
Finance receivables 312,655 311,837
Line of credit 0
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 4,520 1,849
Finance receivables 312,655 311,837
Line of credit 209,000 211,000
Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 4,520 1,849
Finance receivables 312,655 311,837
Line of credit $ 209,000 $ 211,000