Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and cash equivalents	$ 270,124	$ 246,322
Investments, at fair value	230,477	240,105
Accounts receivable, net of allowance of $57 and $80 as of December 31, 2019 and 2018, respectively	62,017	57,535
Goodwill	146,861	59,713
Intangible assets, net of accumulated amortization	60,986	2,962
Furniture, equipment, leasehold improvements and capitalized software, net of accumulated depreciation and amortization	71,795	63,010
Operating lease right-of-use assets	81,399
Prepaid expenses and other assets	30,770	22,468
Deferred tax assets, net	501	3,424
Total assets	954,930	695,539
Liabilities
Accrued employee compensation	47,365	39,053
Income and other tax liabilities	16,690	16,432
Deferred revenue	3,499	2,810
Accounts payable, accrued expenses and other liabilities	19,294	29,366
Operating lease liabilities	97,991
Total liabilities	184,839	87,661
Commitments and Contingencies (Note 14)
Stockholders' equity
Preferred stock
Common stock	122	122
Additional paid-in capital	342,541	341,860
Treasury stock - Common stock voting, at cost, 2,810,609 and 2,900,432 shares as of December 31, 2019 and 2018, respectively	(153,388)	(184,962)
Retained earnings	591,086	463,252
Accumulated other comprehensive loss	(10,270)	(12,394)
Total stockholders' equity	770,091	607,878
Total liabilities and stockholders' equity	954,930	695,539
Series A Preferred Stock [Member]
Stockholders' equity
Preferred stock