Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue:
Total revenue	$ 505.6	$ 426.6	$ 417.2
Operating expenses:
Total operating expenses	370.1	320.6	249.3
Operating income	135.5	106.0	167.9
Non-operating income and (expense):
Total non-operating income (loss)	(9.8)	(9.5)	(23.1)
Income before taxes	125.7	96.5	144.8
Income tax expense	38.9	29.4	44.2
Net income	86.8	67.1	100.6
Net income attributable to non-controlling interests in consolidated Funds	1.8	1.3	0.0
Net income attributable to controlling interests	$ 85.0	$ 65.8	$ 100.6
Earnings per share (basic) attributable to controlling interests (in dollars per share)	$ 2.25	$ 1.59	$ 2.39
Earnings per share (diluted) attributable to controlling interests (in dollars per share)	$ 2.22	$ 1.55	$ 2.33
Weighted average shares outstanding (in shares)	37,770,185	41,493,154	42,056,278
Weighted average diluted shares outstanding (in shares)	38,328,406	42,537,943	43,156,269
Management fees
Revenue:
Total revenue	$ 431.1	$ 373.2	$ 367.4
Consolidated Entity Excluding Consolidated Funds
Operating expenses:
Compensation and benefits	265.5	217.9	159.2
General and administrative expense	85.2	82.6	71.1
Amortization of acquired intangibles	0.0	0.0	0.1
Depreciation and amortization	18.5	17.3	18.5
Non-operating income and (expense):
Investment income (loss)	2.2	(0.1)	0.2
Interest income	3.5	6.1	0.8
Interest expense	(19.4)	(19.6)	(20.5)
Loss on extinguishment of debt	0.0	0.0	(3.2)
Net income	86.8	67.1	100.6
Consolidated Entity Excluding Consolidated Funds | Management fees
Revenue:
Total revenue	431.1	373.2	367.4
Consolidated Entity Excluding Consolidated Funds | Performance fees
Revenue:
Total revenue	71.4	50.4	49.4
Consolidated Funds
Revenue:
Total revenue	3.1	3.0	0.4
Operating expenses:
Total operating expenses	0.9	2.8	0.4
Non-operating income and (expense):
Net consolidated Funds’ investment gains (losses)	$ 3.9	$ 4.1	$ (0.4)