Finance Receivables (Contractual Maturities Of Finance Receivables) (Details) (USD $)	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
2013	$ 1,767,189
2014	1,033,721
2015	1,167,964
2016	1,202,859
2017	632,413
Thereafter	85,373
Total	5,889,519
United States [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2013	1,685,921
2014	988,995
2015	1,117,929
2016	1,146,884
2017	601,981
Thereafter	85,373
Total	5,627,083
Canada [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2013	81,268
2014	44,726
2015	50,035
2016	55,975
2017	30,432
Thereafter	0
Total	$ 262,436