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Income from Financial Services (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |
Income from financial services | $ 33,920 | $ 24,092 | $ 16,856
Polaris Acceptance |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |
Income from financial services | 3,899 | 4,444 | 4,574
Securitization Facility |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |
Income from financial services | 11,862 | 7,686 | 8,027
HSBC/Capital One, GE Bank and Sheffield retail credit agreements |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |
Income from financial services | 15,296 | 9,056 | 2,422
Other financial services activities |  |  |
Schedule of Investment Income, Reported Amounts, by Category [Line Items] |  |  |
Income from financial services | $ 2,863 | $ 2,906 | $ 1,833

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- Definition The aggregate financial services revenue and operating interest income earned during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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