Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 415,379	$ 336,535
Cash segregated under regulatory requirements	220,735	80,243
Securities owned	57,525	58,408
Marketable securities	14,228	32,064
Receivables from broker-dealers, clearing organizations, customers and related broker-dealers	551,445	941,866
Accrued commissions and other receivables, net	778,415	516,091
Loans, forgivable loans and other receivables from employees and partners, net	315,590	216,868
Fixed assets, net	204,841	157,169
Investments	40,349	35,403
Goodwill	553,745	504,646
Other intangible assets, net	303,224	298,779
Receivables from related parties	14,273	7,748
Other assets	446,371	246,937
Total assets	3,916,120	3,432,757
Liabilities, Redeemable Partnership Interest, and Equity
Short-term borrowings	4,962	5,162
Repurchase agreements		986
Securities loaned	13,902	15,140
Accrued compensation	215,085	195,234
Payables to broker-dealers, clearing organizations, customers and related broker-dealers	416,566	769,833
Payables to related parties	72,497	40,155
Accounts payable, accrued and other liabilities	1,283,046	754,819
Notes payable and other borrowings	1,142,687	763,548
Total liabilities	3,148,745	2,544,877
Commitments, contingencies and guarantees (Note 20)
Redeemable partnership interest	23,638	24,706
Stockholders’ equity:
Additional paid-in capital	2,271,947	2,208,221
Treasury stock, at cost: 50,525 and 50,270 shares of Class A common stock at December 31, 2019 and December 31, 2018, respectively	(315,308)	(314,240)
Retained deficit	(1,241,754)	(1,105,019)
Accumulated other comprehensive income (loss)	(33,102)	(24,465)
Total stockholders’ equity	685,826	768,373
Noncontrolling interest in subsidiaries	57,911	94,801
Total equity	743,737	863,174
Total liabilities, redeemable partnership interest, and equity	3,916,120	3,432,757
Class B Common Stock [Member]
Stockholders’ equity:
Common stock value	459	459
Class A Common Stock [Member]
Stockholders’ equity:
Common stock value	$ 3,584	$ 3,417