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Aggregate Carrying Value of Financial Assets and Liabilities from Unconsolidated VIEs (Details) link:presentationLink link:calculationLink link:definitionLink 210491012 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 230503009 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 240514029 - Disclosure - Investments - Securities Available for Sale (Details) link:presentationLink link:calculationLink link:definitionLink 240524030 - Disclosure - Investments - Available for Sale Securities with Unrealized Losses (Details) link:presentationLink link:calculationLink link:definitionLink 240534031 - Disclosure - Investments - Length of Contractual Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 240544032 - Disclosure - Investments - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 210551013 - Disclosure - Variable Interest Entities link:presentationLink link:calculationLink link:definitionLink 210561014 - 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Disclosure - Fair Value of Financial Assets and Liabilities - Quantitative Information About Significant Unobservable Inputs for Servicing Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 240634038 - Disclosure - Fair Value of Financial Assets and Liabilities - Summary of Adverse Changes in Estimates for Servicing Assets and Liabilities Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 240644039 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value of Performance Fee Liability (Details) link:presentationLink link:calculationLink link:definitionLink 240654040 - Disclosure - Fair Value of Financial Assets and Liabilities - Quantitative Information About Significant Unobservable Inputs for Performance Fee Liability (Details) link:presentationLink link:calculationLink link:definitionLink 240664041 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value of Residual Trust Certificates (Details) link:presentationLink link:calculationLink link:definitionLink 240674042 - Disclosure - Fair Value of Financial Assets and Liabilities - Quantitative Information About Significant Unobservable Inputs for Residual Trust Certificates (Details) link:presentationLink link:calculationLink link:definitionLink 240684043 - Disclosure - Fair Value of Financial Assets and Liabilities - Summary of Adverse Changes in Estimates for Residual Trust Certificates Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 240694044 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value of Senior Notes and Residual Trust Certificates (Details) link:presentationLink link:calculationLink link:definitionLink 240704045 - Disclosure - Fair Value of Financial Assets and Liabilities - Quantitative Information About Significant Unobservable Inputs for Senior Notes and Residual Trust Certificated (Details) link:presentationLink link:calculationLink link:definitionLink 240714046 - Disclosure - Fair Value of Financial Assets and Liabilities - Summary of Adverse Changes in Estimates for Securitization Notes and Residual Trust Certificates (Details) link:presentationLink link:calculationLink link:definitionLink 240724047 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value of Contingent Consideration (Details) link:presentationLink link:calculationLink link:definitionLink 240734048 - Disclosure - Fair Value of Financial Assets and Liabilities - Quantitative Information About Significant Unobservable Inputs for Contingent Consideration (Details) link:presentationLink link:calculationLink link:definitionLink 240744049 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value of Profit Share Liability (Details) link:presentationLink link:calculationLink link:definitionLink 240754050 - Disclosure - Fair Value of Financial Assets and Liabilities - Quantitative Information About Significant Unobservable Inputs for Profit Share Liability (Details) link:presentationLink link:calculationLink link:definitionLink 240764051 - Disclosure - Fair Value of Financial Assets and Liabilities - Financial Assets and Liabilities Not Recorded at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 210771015 - 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