Revenues

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Revenues

Revenues

Revenue Disaggregated by Source

The following table summarizes revenue by source:

	Years Ended December 31,
(in thousands)	2020		2019		2018
Investment management fees
Open-end funds	$	247,519	$	229,637	$	231,175
Closed-end funds	36,833		42,199		41,455
Retail separate accounts	104,932		82,999		73,532
Institutional accounts	109,531		96,429		77,711
Structured products	4,012		6,381		9,622
Other products	2,511		3,832		3,526
Total investment management fees	505,338		461,477		437,021
Distribution and service fees	38,425		40,898		50,715
Administration and shareholder service fees	59,463		59,884		63,614
Other income and fees	670		987		885
Total revenues	$	603,896	$	563,246	$	552,235