Finance Receivables (Wholesale And Retail Receivables Accruing Interest And Are Past Due) (Details) (Retail And Wholesale [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007
Financing Receivable, Recorded Investment, Past Due [Line Items]
Receivables past due and accruing interest	$ 28,378	$ 35,742	$ 26,790	$ 24,953	$ 8,350
United States [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Receivables past due and accruing interest	27,171	34,391	24,629	23,678	6,205
Canada [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Receivables past due and accruing interest	1,207	1,351	2,161	1,275	1,759
Europe [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Receivables past due and accruing interest					$ 386