CONDENSED CONSOLIDATED STATEMENTS OF INCOME 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
Revenues:
Total revenues	$ 61,252	$ 75,345	$ 188,378	$ 226,088
Expenses:
Compensation	17,722	29,800	72,488	90,363
Management fee	0	2,144	3,725	8,302
Distribution costs	6,994	8,271	21,258	25,546
Other operating expenses	4,694	5,562	14,982	16,936
Total expenses	29,410	45,777	112,453	141,147
Operating income	31,842	29,568	75,925	84,941
Non-operating income / (loss)
Loss from investments, net	(3,133)	(6,529)	(13,061)	(3,160)
Interest and dividend income	41	811	700	2,250
Interest expense	(691)	(652)	(1,985)	(1,962)
Shareholder-designated contribution	(5,436)	(4,500)	(5,436)	(4,500)
Total non-operating loss	(9,219)	(10,870)	(19,782)	(7,372)
Income before income taxes	22,623	18,698	56,143	77,569
Provision for income taxes	6,188	5,072	17,173	20,034
Net income	$ 16,435	$ 13,626	$ 38,970	$ 57,535
Earnings per share:
Basic (in dollars per share)	$ 0.62	$ 0.50	$ 1.46	$ 2.08
Diluted (in dollars per share)	$ 0.62	$ 0.50	$ 1.46	$ 2.08
Weighted average shares outstanding:
Basic (in shares)	26,531	26,987	26,615	27,612
Diluted (in shares)	26,613	27,093	26,679	27,676
Investment Advisory and Incentive Fees [Member]
Revenues:
Total revenues	$ 54,894	$ 67,015	$ 168,637	$ 200,893
Distribution Fees and Other Income [Member]
Revenues:
Total revenues	$ 6,358	$ 8,330	$ 19,741	$ 25,195