Consolidated Statements of Financial Condition (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 155,100	$ 132,691
Securities available-for-sale, at fair value	57,021	67,742
Accounts receivable, net of allowance of $83 and $133 as of September 30, 2014 and December 31, 2013, respectively	36,947	34,158
Goodwill and intangible assets, net of accumulated amortization	66,989	68,697
Furniture, equipment, leasehold improvements and capitalized software, net of accumulated depreciation and amortization	32,800	32,703
Prepaid expenses and other assets	8,800	10,640
Deferred tax assets, net	5,252	7,279
Total assets	362,909	353,910
Liabilities
Accrued employee compensation	18,384	24,001
Income and other tax liabilities	3,668	3,975
Deferred revenue	3,271	2,713
Accounts payable, accrued expenses and other liabilities	11,283	12,859
Total liabilities	36,606	43,548
Commitments and Contingencies (Note 11)
Stockholders’ equity
Additional paid-in capital	302,320	295,557
Treasury stock - Common stock voting, at cost, 1,949,344 and 1,495,159 shares as of September 30, 2014 and December 31, 2013, respectively	(57,715)	(32,273)
Retained earnings	86,158	51,042
Accumulated other comprehensive loss	(4,580)	(4,083)
Total stockholders’ equity	326,303	310,362
Total liabilities and stockholders’ equity	362,909	353,910
Preferred Stock [Member]
Stockholders’ equity
Preferred stock
Series A Preferred Stock [Member]
Stockholders’ equity
Preferred stock
Voting Common Stock [Member]
Stockholders’ equity
Common stock	120	119
Common Stock Non-Voting [Member]
Stockholders’ equity
Common stock