Consolidated Statements of Operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Revenues		$ 2,218,132	$ 2,047,579	$ 1,596,450
Expenses:
Compensation and employee benefits		1,275,988	1,161,985	987,701
Equity-based compensation and allocations of net income to limited partnership units and FPUs		258,836	224,644	147,139
Total compensation and employee benefits		1,534,824	1,386,629	1,134,840
Operating, administrative and other		361,857	331,758	219,163
Fees to related parties		25,025	26,162	20,771
Depreciation and amortization		131,144	97,733	95,815
Total operating expenses		2,052,850	1,842,282	1,470,589
Other income, net
Other income, net		80,954	127,293	73,927
Income from operations		246,236	332,590	199,788
Interest (expense) income, net		(32,088)	(50,205)	2,786
Income before income taxes and noncontrolling interests		214,148	282,385	202,574
Provision for income taxes		52,436	90,487	57,478
Consolidated net income		161,712	191,898	145,096
Less: Net income attributable to noncontrolling interests		44,407	85,166	604
Net income available to common stockholders		117,305	106,732	144,492
Basic earnings per share
Net income available to common stockholders	[1]	$ 104,406	$ 101,641	$ 144,492
Basic earnings per share (in usd per share)		$ 0.59	$ 0.65	$ 1.08
Common stock outstanding (in shares)		177,774,000	157,256,000	133,413,000
Fully diluted earnings per share
Net income for fully diluted shares		$ 108,160	$ 105,571	$ 117,217
Fully diluted earnings per share (in usd per share)		$ 0.58	$ 0.64	$ 0.85
Fully diluted weighted-average shares of common stock outstanding (in shares)		185,016,000	163,810,000	138,398,000
Reduction for dividends on preferred stock or units		$ 12,900	$ 5,100
Commissions
Revenues:
Revenues		1,396,035	1,286,339	$ 1,014,716
Gains from mortgage banking activities/originations, net
Revenues:
Revenues		198,085	182,264	206,000
Management services, servicing fees and other
Revenues:
Revenues		$ 624,012	$ 578,976	$ 375,734

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