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Finance Receivables, Allowance for Credit Losses, and Credit Quality Information - Schedule of Average Recorded Investment in Impaired Finance Receivables (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Impaired [Line Items]
Total average recorded investment	$ 6,132	$ 8,214	$ 6,147	$ 8,906
Branch Small [Member]
Financing Receivable, Impaired [Line Items]
Total average recorded investment	598	1,085	600	1,225
Convenience Checks [Member]
Financing Receivable, Impaired [Line Items]
Total average recorded investment	498	1,198	514	1,442
Large [Member]
Financing Receivable, Impaired [Line Items]
Total average recorded investment	1,340	1,539	1,291	1,711
Automobile [Member]
Financing Receivable, Impaired [Line Items]
Total average recorded investment	3,567	4,183	3,616	4,257
Retail [Member]
Financing Receivable, Impaired [Line Items]
Total average recorded investment	$ 129	$ 209	$ 126	$ 271

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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.

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- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 310



-SubTopic 10



-Section 50



-Paragraph 15



-Subparagraph (c)(1)



-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 310



-SubTopic 10



-Section 50



-Paragraph 17



-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5258-111524

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