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Fair Values of Assets and Liabilities Quantitative Information about Level 3 Liabilities Fair Value Measurements (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2016	Dec. 31, 2015
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Notes payable associated with structured financings, at fair value		$ 15,626	$ 20,970
Gross yield		24.00%	28.50%
Principal payment rate		2.60%	2.90%
Expected credit loss rate		11.10%	12.50%
Discount rate		16.10%	16.00%
Loans And Fees Receivable [Member] | Minimum [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Gross yield		27.90%	15.80%
Principal payment rate		1.90%	2.10%
Expected credit loss rate		11.80%	12.90%
Discount rate		16.10%	16.00%
Fair Value Inputs Servicing Rate		8.00%	8.40%
Loans And Fees Receivable [Member] | Maximum [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Gross yield		33.10%	22.70%
Principal payment rate		3.50%	3.00%
Expected credit loss rate		25.50%	22.70%
Discount rate		16.20%	16.20%
Fair Value Inputs Servicing Rate		8.30%	12.50%
Loans And Fees Receivable [Member] | Weighted Average [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Gross yield		29.70%	20.00%
Principal payment rate		2.90%	2.70%
Expected credit loss rate		16.50%	16.70%
Discount rate		16.10%	16.10%
Fair Value Inputs Servicing Rate		8.20%	10.90%
Loans and Fees Receivable Pledged as Collateral [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Gross yield	[1]	24.00%	28.50%
Principal payment rate	[1]	2.60%	2.90%
Expected credit loss rate	[1]	11.10%	12.50%
Discount rate	[1]	16.10%	16.00%
Fair Value Inputs Servicing Rate	[1]	8.00%	12.90%
[1] (1) Our loans and fees receivable, pledged as collateral under structured financings, 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 in the future as an input to measure fair value pertaining to gross yield.

+ References

No definition available.

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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.

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- Definition

Debt that reflects the fair value of the consolidation of our securitization trusts presenting certain non-recourse, asset-backed structured financing debt facilities that are secured by these credit card receivables that are held within such trusts.

+ References

No definition available.

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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=66048111&loc=d3e19207-110258

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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=66048111&loc=d3e19207-110258

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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=66048111&loc=d3e19207-110258

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