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Finance Receivables (Recorded Investment Of Wholesale Finance Receivables By Internal Credit Quality Indicator) (Detail) (Wholesale [Member], USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Sep. 25, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Finance receivables, gross $ 785,323 $ 824,640 $ 717,044
Doubtful [Member]
     
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Finance receivables, gross 10,072 13,048 8,260
Substandard [Member]
     
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Finance receivables, gross 3,689 5,052 9,115
Special Mention [Member]
     
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Finance receivables, gross 2,446 14,361 6,652
Medium [Member]
     
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Finance receivables, gross 6,035 3,032 4,305
Low [Member]
     
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Finance receivables, gross $ 763,081 $ 789,147 $ 688,712