Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue
Total revenue	$ 188,656	$ 214,980	$ 574,963	$ 393,819
Expenses
Personnel compensation and benefits	47,375	55,556	144,051	125,599
Distribution and other asset-based expenses	39,123	57,202	135,613	89,151
General and administrative	13,196	17,654	38,373	31,828
Depreciation and amortization	3,936	7,768	12,152	18,253
Change in value of consideration payable for acquisition of business	2,000		1,800	(14)
Acquisition-related costs	1,148	16,386	1,056	21,950
Restructuring and integration costs	1,285	4,841	4,888	6,629
Total operating expenses	108,063	159,407	337,933	293,396
Income from operations	80,593	55,573	237,030	100,423
Other (expense) income
Interest income and other (expense) income	1,120	2,742	(86)	5,231
Interest expense and other financing costs	(8,187)	(16,856)	(29,305)	(26,000)
Loss on debt extinguishment	(758)	(7,409)	(1,675)	(7,409)
Total other expense, net	(7,825)	(21,523)	(31,066)	(28,178)
Income before income taxes	72,768	34,050	205,964	72,245
Income tax expense	(17,027)	(8,058)	(48,337)	(17,343)
Net income	$ 55,741	$ 25,992	$ 157,627	$ 54,902
Earnings per share of common stock
Basic	$ 0.82	$ 0.38	$ 2.33	$ 0.81
Diluted	$ 0.76	$ 0.35	$ 2.14	$ 0.75
Weighted average number of shares outstanding
Basic	67,743	67,724	67,785	67,610
Diluted	73,437	73,671	73,703	73,300
Dividends declared per share of common stock	$ 0.06	$ 0.05	$ 0.16	$ 0.05
Investment Management Fees
Revenue
Total revenue	$ 137,240	$ 155,406	$ 414,153	$ 307,859
Fund Administration and Distribution Fees
Revenue
Total revenue	$ 51,416	$ 59,574	$ 160,810	$ 85,960