Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
REVENUES:
Total revenues	$ 1,218,341	$ 910,880	$ 662,887
OPERATING EXPENSES:
Compensation and related expenses	431,465	358,084	265,555
Management fees	304,701	232,703	163,617
Selling, general and administrative	232,911	170,270	134,615
Management contract buyout	1,428
Intangible amortization	130,718	90,381	64,367
Non-cash changes in fair value of estimated contingent consideration	38,797	6,638	22,294
Depreciation and other amortization	10,675	8,370	6,686
Total operating expenses	1,150,695	866,446	657,134
INCOME FROM OPERATIONS	67,646	44,434	5,753
OTHER INCOME (EXPENSE):
Interest income	1,164	1,266	222
Interest expense	(58,291)	(56,448)	(41,861)
Amortization of debt financing costs	(3,452)	(3,498)	(4,084)
Gain on sale of investment		5,509
Loss on extinguishment of borrowings		(21,071)	(8,106)
Other (expense) income—net	(1,049)	(2,350)	(3,191)
Income from equity method investments	755	521	1,407
Impairment of equity method investment	(11,749)
Total other expense-net	(72,622)	(76,071)	(55,613)
LOSS BEFORE INCOME TAX	(4,976)	(31,637)	(49,860)
INCOME TAX EXPENSE (BENEFIT)	7,049	9,450	(1,501)
NET LOSS	(12,025)	(41,087)	(48,359)
Non-controlling interest	(847)	40,497
NET LOSS ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ (12,872)	(590)
Weighted average shares of Class A common stock outstanding:
Diluted	46,792,389
Wealth management fees
REVENUES:
Total revenues	$ 1,149,655	853,033	617,124
Other
REVENUES:
Total revenues	$ 68,686	$ 57,847	$ 45,763
Class A common stock
Income (loss) per share of Class A common stock:
Basic	$ (0.28)	$ (0.01)
Diluted	$ (0.28)	$ (0.01)
Weighted average shares of Class A common stock outstanding:
Basic	46,792,389	43,122,782
Diluted	46,792,389	43,122,782