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Fair Values of Assets and Liabilities Quantitative Information about Level 3 Assets Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified |  |  | 6 Months Ended |  | 6 Months Ended
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Jun. 30, 2013 | Dec. 31, 2012 | Jun. 30, 2013 Minimum [Member] | Jun. 30, 2013 Maximum [Member] | Jun. 30, 2013 Weighted Average [Member] | Jun. 30, 2013 Loans And Fees Receivable [Member] | Jun. 30, 2013 Loans and Fees Receivable Pledged as Collateral [Member] | Jun. 30, 2013 Loans and Fees Receivable Pledged as Collateral [Member] Minimum [Member] | Jun. 30, 2013 Loans and Fees Receivable Pledged as Collateral [Member] Maximum [Member] | Jun. 30, 2013 Loans and Fees Receivable Pledged as Collateral [Member] Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans and fees receivable, at fair value | $ 15,662 | $ 20,378 |  |  |  | $ 15,662 |  | $ 107,258 |  |  |  |  |  |
Gross yield |  |  | 8.40% | 25.30% | 18.80% | 23.50% | [1] |  | 8.40% | [1] | 25.30% | [1] | 18.80% | [1]
Principal payment rate |  |  | 1.50% | 3.20% | 2.50% | 3.70% | [1] |  | 1.50% | [1] | 3.20% | [1] | 2.50% | [1]
Expected credit loss rate |  |  | 11.70% | 23.00% | 18.70% | 17.00% | [1] |  | 11.70% | [1] | 23.00% | [1] | 18.70% | [1]
Servicing rate |  |  |  |  |  | 11.20% | [1] |  | 6.80% | [1] | 8.50% | [1] | 7.80% | [1]
Gross yield |  |  | 15.90% | 20.30% | 17.60% | 15.90% | [1] |  | 15.90% | [1] | 16.20% | [1] | 16.00% | [1]
Loans and fees receivable pledged as collateral under structured financings, at fair value | $ 107,258 | $ 133,595 |  |  |  |  |  |  |  |  |  |  |  |
[1] | Our loans and fees receivable, at fair value consist of a single portfolio with one set of assumptions. As such, no range is given.

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- Definition Represents rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value pertaining to servicing costs. + References No definition available. + Details
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- Definition Reflects the fair value of the de-securitized and reconsolidated lower-tier credit card receivables. + References No definition available. + Details
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- Definition Assets that reflects the fair value of the consolidation of our securitization trusts presenting certain non-recourse, asset-backed structured financing debt facilities that is secured by these credit card receivables that are held within such trusts. + References No definition available. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Percentage of likelihood a loan will not be repaid and instead default, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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