Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Commissions	$ 260,735	$ 204,958
Gains from mortgage banking activities/originations, net	38,914	45,262
Management services, servicing fees and other	130,811	82,362
Total revenues	430,460	332,582
Expenses:
Compensation and employee benefits	252,695	215,145
Allocations of net income and grant of exchangeability to limited partnership units	25,809	10,649
Total compensation and employee benefits	278,504	225,794
Operating, administrative and other	75,427	47,382
Fees to related parties	6,894	4,718
Depreciation and amortization	22,513	18,237
Total operating expenses	383,338	296,131
Other income (losses), net:
Other income (loss)	5,707	(593)
Total other income (losses), net	5,707	(593)
Income from operations	52,829	35,858
Interest (expense) income, net	(13,409)	1,134
Income before income taxes and noncontrolling interests	39,420	36,992
Provision (benefit) for income taxes	6,933	(15)
Consolidated net income	32,487	37,007
Less: Net income attributable to noncontrolling interests	12,490	296
Net income available to common stockholders	19,997	36,711
Basic earnings per share
Net income available to common stockholders	$ 19,997	$ 36,711
Basic earnings per share	$ 0.13
Basic weighted-average shares of common stock outstanding	155,694
Fully diluted earnings per share
Net income available to common stockholders	$ 30,286
Fully diluted earnings (loss) per share	$ 0.12
Fully diluted weighted-average shares of common stock outstanding	246,834
Dividends declared per share of common stock	$ 0.09