Revenues (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table summarizes revenue by source:

	Three Months Ended March 31,
	2019		2018
($ in thousands)
Investment management fees
Open-end funds	$	53,293	$	54,361
Closed-end funds	10,019		10,378
Retail separate accounts	18,005		16,529
Institutional accounts	22,177		15,818
Structured products	1,647		2,326
Other products	777		1,064
Total investment management fees	105,918		100,476
Distribution and service fees	10,063		12,607
Administration and shareholder service fees	14,413		15,738
Other income and fees	324		207
Total revenues	$	130,718	$	129,028