Fair Value Measurements And Disclosures - Financial Instruments Not Required to be Carried at Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Financial assets:
Cash and cash equivalents, carrying amount	$ 40,542	$ 39,661	$ 191,819	$ 162,004
Cash and cash equivalents, estimated fair value	40,542	39,661
Securitized assets	53,716us-gaap_HeldToMaturitySecurities	31,017us-gaap_HeldToMaturitySecurities
Aggregate Fair Value	53,716	31,017
Finance receivables, net, carrying amount	1,954,772	2,001,790	1,253,961	1,239,191
Finance receivables, net, estimated fair value	2,501,671	2,460,787
Financial liabilities:
Interest-bearing deposits, carrying value	32,439	27,704
Interest-bearing deposits, fair value	32,439us-gaap_DepositsFairValueDisclosure	27,704us-gaap_DepositsFairValueDisclosure
Outstanding borrowings under credit facility	866,188us-gaap_LineOfCredit	836,680us-gaap_LineOfCredit
Revolving lines of credit, estimated fair value	866,188	836,680
Term loans, carrying amount	181,250us-gaap_DebtInstrumentCarryingAmount	185,000us-gaap_DebtInstrumentCarryingAmount
Term loans, estimated fair value	181,250us-gaap_LongTermDebtFairValue	185,000us-gaap_LongTermDebtFairValue
Notes and loans payable, carrying value	169,938us-gaap_NotesAndLoansPayable	199,938us-gaap_NotesAndLoansPayable
Notes and loans payable, fair value disclosure	169,938	199,938
Convertible debt	261,886us-gaap_ConvertibleDebt	260,838us-gaap_ConvertibleDebt
Convertible debt, estimated fair value	310,230	324,757
Reported Value Measurement [Member]
Financial assets:
Cost Method Investments, Fair Value Disclosure	18,656	17,560
Estimate of Fair Value Measurement [Member]
Financial assets:
Cost Method Investments, Fair Value Disclosure	$ 19,601	$ 19,776

Fair value of certain loans acquired in transfer not accounted for as Debt Securities Outstanding Balance.

No definition available.

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- Definition

Notes and Loans Payable, Fair Value Disclosure

+ References

No definition available.

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- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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Fair value portion of investments accounted under the cost method.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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- Definition

Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

+ References

No definition available.

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- Definition

Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Fair value of investments in debt securities classified as held-to-maturity.

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- Definition

The aggregate of all domestic and foreign interest-bearing deposit liabilities.

+ References

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

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-Glossary Line-of-Credit Arrangement

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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