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3. Fair Value of Delinquency Status of Finance Receivables (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Deliquency Status |  |
Total finance receivables measured at fair value | $ 21,701 | $ 60,804
Current |  |
Deliquency Status |  |
Total finance receivables measured at fair value | 19,795 | 57,557
31-60 days |  |
Deliquency Status |  |
Total finance receivables measured at fair value | 1,218 | 2,206
61-90 days |  |
Deliquency Status |  |
Total finance receivables measured at fair value | 436 | 710
91 + days |  |
Deliquency Status |  |
Total finance receivables measured at fair value | $ 252 | $ 331

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Data Type: | xbrli:stringItemType
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Glossary Loan -URI http://asc.fasb.org/extlink&oid=6517073 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant