Consolidated Statements of Financial Condition (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 150,101	$ 169,620
Securities available-for-sale, at fair value	54,181	78,110
Accounts receivable, net of allowance of $322 and $1,086 as of September 30, 2012 and December 31, 2011, respectively	33,414	36,170
Deferred tax assets, net	6,702	8,089
Goodwill and intangible assets, net of accumulated amortization	33,480	34,544
Furniture, equipment, leasehold improvements and capitalized software, net of accumulated depreciation and amortization	18,466	14,460
Prepaid expenses and other assets	8,584	8,465
Total assets	304,928	349,458
Liabilities
Accrued employee compensation	15,435	19,425
Deferred revenue	5,064	5,326
Accounts payable, accrued expenses and other liabilities	12,495	12,268
Total liabilities	32,994	37,019
Commitments and Contingencies (Note 10)
Stockholders' equity
Preferred stock
Additional paid-in capital	277,744	340,716
Treasury stock - Common stock voting, at cost, 1,409,956 shares and 1,541,739 shares as of September 30, 2012 and December 31, 2011, respectively	(29,743)	(25,933)
Retained earnings (deficit)	26,632	(584)
Accumulated other comprehensive loss	(2,817)	(1,882)
Total stockholders' equity	271,934	312,439
Total liabilities and stockholders' equity	304,928	349,458
Series A Preferred Stock
Stockholders' equity
Preferred stock
Common Stock Voting
Stockholders' equity
Common stock	118	113
Total stockholders' equity	118	113
Common Stock Non-Voting
Stockholders' equity
Common stock		9
Total stockholders' equity		$ 9