Consolidated Statements of Financial Condition (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 130,045	$ 132,691
Securities available-for-sale, at fair value	63,483	67,742
Accounts receivable, net of allowance of $170 and $133 as of March 31, 2014 and December 31, 2013, respectively	39,077	34,158
Goodwill and intangible assets, net of accumulated amortization	68,127	68,697
Furniture, equipment, leasehold improvements and capitalized software, net of accumulated depreciation and amortization	33,393	32,703
Prepaid expenses and other assets	9,333	10,640
Deferred tax assets, net	2,915	4,947
Total assets	346,373	351,578
Liabilities
Accrued employee compensation	6,183	23,811
Deferred revenue	2,722	2,713
Accounts payable, accrued expenses and other liabilities	19,207	14,692
Total liabilities	28,112	41,216
Commitments and Contingencies (Note 11)
Stockholders' equity
Preferred stock
Common stock	119	119
Additional paid-in capital	295,617	295,557
Treasury stock-Common stock voting, at cost, 1,549,159 and 1,495,159 shares as of March 31, 2014 and December 31, 2013, respectively	(35,659)	(32,273)
Retained earnings	62,471	51,042
Accumulated other comprehensive loss	(4,287)	(4,083)
Total stockholders' equity	318,261	310,362
Total liabilities and stockholders' equity	346,373	351,578
Series A Preferred Stock [Member]
Stockholders' equity
Preferred stock
Common Stock Non-Voting [Member]
Stockholders' equity
Common stock