Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 363,811	$ 270,124
Investments, at fair value	135,617	230,477
Accounts receivable, net of allowance of $83 and $57 as of March 31, 2020 and December 31, 2019, respectively	93,572	62,017
Goodwill	147,394	146,861
Intangible assets, net of accumulated amortization	60,285	60,986
Furniture, equipment, leasehold improvements and capitalized software, net of accumulated depreciation and amortization	74,926	71,795
Operating lease right-of-use assets	79,651	81,399
Prepaid expenses and other assets	20,289	30,770
Deferred tax assets, net	58	501
Total assets	975,603	954,930
Liabilities
Accrued employee compensation	21,929	47,365
Income and other tax liabilities	20,776	16,690
Deferred revenue	3,950	3,499
Accounts payable, accrued expenses and other liabilities	34,764	19,294
Operating lease liabilities	96,301	97,991
Total liabilities	177,720	184,839
Commitments and Contingencies (Note 12)
Stockholders' equity
Preferred stock
Common stock	122	122
Additional paid-in capital	328,055	342,541
Treasury stock - Common stock voting, at cost, 2,824,100 and 2,810,609 shares as of March 31, 2020 and December 31, 2019, respectively	(158,803)	(153,388)
Retained earnings	643,129	591,086
Accumulated other comprehensive loss	(14,620)	(10,270)
Total stockholders' equity	797,883	770,091
Total liabilities and stockholders' equity	975,603	954,930
Series A Preferred Stock [Member]
Stockholders' equity
Preferred stock