Revenues (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table summarizes investment management fees by source:

	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands)	2021		2020		2021		2020
Investment management fees
Open-end funds	$	96,795	$	54,018	$	185,667	$	113,126
Closed-end funds	16,395		8,557		29,335		18,736
Retail separate accounts	42,475		22,398		79,987		48,112
Institutional accounts	35,782		24,606		68,220		47,523
Structured products	1,585		417		2,844		1,991
Other products	478		554		726		1,350
Total investment management fees	$	193,510	$	110,550	$	366,779	$	230,838