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Fair Value Disclosures - Summary of financial instruments not measured at fair value (Details 1) - USD ($)	Dec. 31, 2015	Mar. 31, 2015
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Finance receivables	$ 0
Line of credit	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Finance receivables	0
Line of credit	213,000,000	$ 199,000,000
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Finance receivables	310,314,000	$ 288,904,000
Line of credit	0
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Finance receivables	310,314,000	$ 288,904,000
Line of credit	$ 213,000,000	$ 199,000,000

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Line-of-Credit Arrangement
-URI http://asc.fasb.org/extlink&oid=6517033

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X

- Definition

Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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