Finance Receivables (Contractual Maturities Of Finance Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
2014	$ 1,942,615
2015	1,069,453
2016	1,200,932
2017	1,309,939
2018	990,260
Thereafter	47,046
Total	6,560,245
United States [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2014	1,856,097
2015	1,029,075
2016	1,155,891
2017	1,259,696
2018	953,581
Thereafter	47,046
Total	6,301,386
Canada [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
2014	86,518
2015	40,378
2016	45,041
2017	50,243
2018	36,679
Thereafter	0
Total	$ 258,859