Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue:
Total revenue	$ 127.4	$ 109.0	$ 247.3	$ 214.7
Operating expenses:
Total operating expenses	111.2	88.4	199.2	171.2
Operating income	16.2	20.6	48.1	43.5
Non-operating income and (expense):
Investment income (loss)	(0.2)	0.1	0.1	1.0
Interest income	0.8	0.9	1.9	2.2
Interest expense	(5.3)	(5.3)	(10.1)	(10.3)
Total non-operating income (loss)	7.4	(3.5)	7.6	(4.6)
Income before income taxes	23.6	17.1	55.7	38.9
Income tax expense	4.5	5.6	12.8	11.7
Net income	19.1	11.5	42.9	27.2
Comprehensive income attributable to redeemable non-controlling interests in consolidated Funds	9.0	0.5	12.7	1.6
Net income attributable to controlling interests	$ 10.1	$ 11.0	$ 30.2	$ 25.6
Earnings per share (basic) attributable to controlling interests (in dollars per share)	$ 0.28	$ 0.29	$ 0.82	$ 0.67
Earnings per share (diluted) attributable to controlling interests (in dollars per share)	$ 0.28	$ 0.29	$ 0.82	$ 0.66
Weighted average common stock outstanding (in shares)	35,912,023	37,547,741	36,633,243	38,305,631
Weighted average diluted common stock outstanding (in shares)	35,929,662	38,238,620	36,651,092	38,985,030
Management fees
Revenue:
Total revenue	$ 122.3	$ 105.5	$ 235.2	$ 207.7
Consolidated Entity Excluding Consolidated Funds
Operating expenses:
Compensation and benefits	83.8	62.2	144.6	120.3
General and administrative expense	21.8	21.1	44.1	41.1
Depreciation and amortization	4.2	5.0	8.4	9.6
Non-operating income and (expense):
Investment income (loss)	(0.2)	0.1	0.1	1.0
Interest income	0.8	0.9	1.9	2.2
Interest expense	(5.3)	(5.3)	(10.1)	(10.3)
Net income			42.9	27.2
Consolidated Entity Excluding Consolidated Funds | Management fees
Revenue:
Total revenue	122.3	105.5	235.2	207.7
Consolidated Entity Excluding Consolidated Funds | Performance fees
Revenue:
Total revenue	2.6	2.8	7.9	5.9
Consolidated Funds
Revenue:
Total revenue	2.5	0.7	4.2	1.1
Operating expenses:
Total operating expenses	1.4	0.1	2.1	0.2
Non-operating income and (expense):
Net consolidated Funds’ investment gains	$ 12.1	$ 0.8	$ 15.7	$ 2.5