Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Estimated Fair Values of Financial Instrument Assets and Liabilities Which are Not Measured at Fair Value on the Consolidated Balance Sheets

The estimated fair values of the Company’s financial instrument assets and liabilities which are not measured at fair value on the consolidated balance sheets are as follows:

	December 31, 2015
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3		Total
Financial Assets
Cash and cash equivalents	$	70,067	$	70,067	$	—	$	—	$	70,067
Due from broker, dealers and clearing organizations		5,513		—		5,513		—		5,513
Non-interest bearing receivables		7,324		—		7,324		—		7,324
Other investments, at cost ⁽¹⁾		5,000		—		—		5,000		5,000
Financial Liabilities
Accounts payable, accrued expenses and other liabilities ⁽¹⁾		18,680		—		18,680		—		18,680

(1)	As of December 31, 2015, there were $1,539 of other investments, at cost and $1,267 of accounts payable, accrued expenses and other liabilities recorded at fair value on a non-recurring basis.

	December 31, 2014
			Estimated Fair Value
	Carrying Amount		Level 1		Level 2		Level 3		Total
Financial Assets
Cash and cash equivalents	$	108,962	$	108,962	$	—	$	—	$	108,962
Due from brokers, dealers and clearing organizations		94,489		—		94,489		—		94,489
Non-interest bearing receivables		8,576		—		8,576		—		8,576
Other investments, at cost		7,000		—		—		7,395		7,395
Financial Liabilities
Accounts payable, accrued expenses and other liabilities		23,093		—		23,093		—		23,093