CONDENSED CONSOLIDATED STATEMENTS OF INCOME UNAUDITED - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues
Total revenues	$ 69,567	$ 74,336
Expenses
Compensation	29,250	30,347
Management fee	1,665	1,449
Distribution costs	7,630	8,670
Other operating expenses	5,702	5,257
Total expenses	44,247	45,723
Operating income	25,320	28,613
Non-operating income / (loss)
Gain / (loss) from investments, net	(10,237)	(1,895)
Interest and dividend income	544	724
Interest expense	(647)	(655)
Total non-operating income / (loss)	(10,340)	(1,826)
Income before income taxes	14,980	26,787
Provision for income taxes	3,735	6,895
Net income	$ 11,245	$ 19,892
Earnings per share
Basic (in dollars per share)	$ 0.42	$ 0.70
Diluted (in dollars per share)	$ 0.42	$ 0.70
Weighted average shares outstanding
Basic (in shares)	26,687	28,507
Diluted (in shares)	26,770	28,539
Investment Advisory and Incentive Fees [Member]
Revenues
Total revenues	$ 62,273	$ 65,888
Distribution Fees and Other Income [Member]
Revenues
Total revenues	$ 7,294	$ 8,448