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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
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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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