Finance Receivables (Finance Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	$ 6,110,256	$ 5,889,519	$ 5,912,130	$ 6,191,158	$ 4,961,894
Allowance for credit losses	(110,693)	(107,667)	(125,449)	(173,589)	(150,082)
Financing Receivable, Net	5,999,563	5,781,852	5,786,681	6,017,569	4,811,812
Investment in retained securitization interests	0	0	0	0	245,350
Total of finance receivables, net and investment in retained securitization interests	5,999,563	5,781,852	5,786,681	6,017,569	5,057,162
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	845,212	816,404	824,640	813,997	870,001
Allowance for credit losses	(4,630)	(6,225)	(9,337)	(15,798)
Commercial Portfolio Segment [Member] | United States [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	800,491	776,633	778,320	735,481	787,891
Commercial Portfolio Segment [Member] | Canada [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	44,721	39,771	46,320	78,516	82,110
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	5,265,044	5,073,115	5,087,490	5,377,161	4,091,893
Allowance for credit losses	(106,063)	(101,442)	(116,112)	(157,791)
Consumer Portfolio Segment [Member] | United States [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	5,051,245	4,850,450	4,858,781	5,126,699	3,835,235
Consumer Portfolio Segment [Member] | Canada [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	$ 213,799	$ 222,665	$ 228,709	$ 250,462	$ 256,658