Dealer Finance Receivables - GO - Non-Accretable Yield (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Receivables [Abstract]
Contractual Cash Not Expected to be Received, Maximum, Percentage	100.00%
Contractual Net Cash Flows	$ 191,734	[1]
Expected Net Cash Flows	(132,308)
Non-accretable Yield	$ 59,426

[1] Contractual net cash flows represents total cash payments due across all dealer servicing agreements for repayment of dealer advances and contract servicing.