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.