CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Revenues		$ 1,904,998	$ 2,218,132	$ 2,047,579
Expenses:
Compensation and employee benefits		1,147,360	1,275,988	1,161,985
Equity-based compensation and allocations of net income to limited partnership units and FPUs		130,759	258,836	224,644
Total compensation and employee benefits		1,278,119	1,534,824	1,386,629
Operating, administrative and other		294,405	361,857	331,758
Fees to related parties		22,573	25,025	26,162
Depreciation and amortization		141,193	131,144	97,733
Total operating expenses		1,736,290	2,052,850	1,842,282
Other income, net		15,290	80,954	127,293
Income from operations		183,998	246,236	332,590
Interest expense, net		(37,728)	(32,088)	(50,205)
Income before income taxes and noncontrolling interests		146,270	214,148	282,385
Provision for income taxes		36,993	52,436	90,487
Consolidated net income		109,277	161,712	191,898
Less: Net income attributable to noncontrolling interests		29,217	44,407	85,166
Net income available to common stockholders		80,060	117,305	106,732
Basic earnings per share
Net income available to common stockholders	[1]	$ 70,281	$ 104,406	$ 101,641
Basic earnings per share (in usd per share)		$ 0.39	$ 0.59	$ 0.65
Basic weighted-average shares of common stock outstanding (in shares)		179,106	177,774	157,256
Fully diluted earnings per share
Net income for fully diluted shares		$ 70,281	$ 108,160	$ 105,571
Fully diluted earnings per share (in usd per share)		$ 0.39	$ 0.58	$ 0.64
Fully diluted weighted-average shares of common stock outstanding (in shares)		179,690	185,016	163,810
Commissions
Revenues:
Revenues		$ 967,948	$ 1,396,035	$ 1,286,339
Gains from mortgage banking activities/originations, net
Revenues:
Revenues		310,914	198,085	182,264
Management services, servicing fees and other
Revenues:
Revenues		$ 626,136	$ 624,012	$ 578,976

[1] Includes a reduction for dividends on preferred stock or exchangeable preferred partnership units in the amount of $9.8 million, $12.9 million and $5.1 million for the years ended December 31, 2020, 2019 and 2018, respectively.