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Fair Value Measurements - Additional Information (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Auction rate securities related to settlements with regulators |  | $ 5,000,000 |  |  |
Valuation adjustment (unrealized loss) for ARS |  | 6,542,000 |  |  |
Loan position held in secondary loan trading portfolio |  | 0 |  | $ 0 |
Fair value of the reverse repurchase agreements |  | 206,499,000 | [1] | 250,000,000 | [2]
Fair value of the repurchase agreements |  | $ 0 |  |  |
Loans held for sale period |  | 60 days |  |  |
Loans held for sale, maximum period |  | 90 days |  |  |
Book value of loan held for sale |  | $ 55,300,000 |  |  |
Loans held for sale |  | $ 60,234,000 |  | 19,243,000 |
Forward or delayed delivery of the underlying instrument with settlement |  | 180 days |  |  |
Senior Secured Notes |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Interest rate |  | 8.75% |  |  |
Auction rate securities |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Total amount of ARS the firm purchased and hold |  | $ 92,000,000 |  |  |
Amount of ARS committed to purchase from clients |  | $ 22,800,000 |  |  |
Auction rate securities | Fair Value, Valuation Scenario One |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Basis point |  | 25.00% |  |  |
Decrease in fair value of ARS |  | $ 1,100,000 |  |  |
Auction rate securities | Fair Value, Valuation Scenario Two |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Basis point |  | 50.00% |  |  |
Decrease in fair value of ARS |  | $ 2,100,000 |  |  |
Auction rate securities | Maximum |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Commitment to purchase ARS period maximum |  | 2020 |  |  |
ARS purchase commitments | ARS purchase commitments |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Valuation adjustment (unrealized loss) for ARS |  | $ 1,400,000 |  |  |
Mortgage Servicing Rights |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Permanent and construction loans, discount rate |  | 12.00% |  |  |
Continuous prepayment rate used up to loans prepayment penalty rate hit 4% |  | 0.00% |  |  |
Continuous prepayment rate |  | 4.00% |  |  |
Continuous prepayment rate vast majority range minimum |  | 10.00% |  |  |
Continuous prepayment rate vast majority range maximum |  | 15.00% |  |  |
Continuous prepayment rate vast majority range average rate |  | 12.00% |  |  |
Estimated future cost to service loans on an annual basis per loan, average |  | $ 1,250 |  |  |
ARS purchase commitments |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Valuation adjustment (unrealized loss) for ARS | [3] | 1,369,000 |  |  |
Auction Rate Securities Owned |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Valuation adjustment (unrealized loss) for ARS | [3] | 5,173,000 |  |  |
Deferred Compensation Share Based Payments | Equity securities |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Fair value of the corporate equities that are included in securities owned |  | $ 14,000,000 |  | $ 15,700,000 |
[1] | Included in securities purchased under agreements to resell where the Company has elected fair value option treatment.
[2] | Included in securities purchased under agreements to resell where the Company has elected fair value option treatment.
[3] | Principal amount represents the par value of the ARS and is included in securities owned in the consolidated balance sheet at December 31, 2015. The valuation adjustment amount is included as a reduction to securities owned in the consolidated balance sheet at December 31, 2015.

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