Consolidated Statements of Financial Condition (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 132,691	$ 128,908
Securities available-for-sale, at fair value	67,742	51,208
Accounts receivable, net of allowance of $133 and $75 as of December 31, 2013 and December 31, 2012, respectively	34,158	31,044
Goodwill and intangible assets, net of accumulated amortization	68,697	33,134
Furniture, equipment, leasehold improvements and capitalized software, net of accumulated depreciation and amortization	32,703	18,009
Prepaid expenses and other assets	10,640	8,096
Deferred tax assets, net	4,947	9,442
Total assets	351,578	279,841
Liabilities
Accrued employee compensation	23,811	19,916
Deferred revenue	2,713	4,864
Accounts payable, accrued expenses and other liabilities	14,692	12,344
Total liabilities	41,216	37,124
Commitments and Contingencies (Note 13)
Stockholders' equity
Preferred stock
Additional paid-in capital	295,557	283,609
Treasury stock-Common stock voting, at cost, 1,495,159 shares as of December 31, 2013 and December 31, 2012	(32,273)	(32,273)
Retained earnings (deficit)	51,042	(5,644)
Accumulated other comprehensive loss	(4,083)	(3,093)
Total stockholders' equity	310,362	242,717
Total liabilities and stockholders' equity	351,578	279,841
Common Stock Voting [Member]
Stockholders' equity
Common stock	119	118
Total stockholders' equity	119	118
Series A Preferred Stock [Member]
Stockholders' equity
Preferred stock
Common Stock Non-Voting [Member]
Stockholders' equity
Common stock