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Finance Receivables, Credit Quality Information, and Allowance for Credit Losses - Summary of Impaired Finance Receivables (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired finance receivables	$ 10,047	$ 7,260
Small Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired finance receivables	2,084	1,009
Large Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired finance receivables	5,322	2,760
Automobile Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired finance receivables	2,526	3,370
Retail Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired finance receivables	$ 115	$ 121

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- 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.

+ Details

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- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

+ Details

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- Details

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