Investments - Narratives (Details) $ in Thousands	6 Months Ended
Jun. 30, 2026 USD ($) investment	Dec. 31, 2025 USD ($)
Net Investment Income [Line Items]
Investments accounted for under the equity method	$ 397,445	$ 357,383
Fair Value, Investments, Privately Held Entities that Calculate NAV, Unfunded Commitments	$ 317,600
Limited partnership maximum expiration terms	12 years
Weighted-average remaining liquidation term (in years)	5 years 6 months
Limited partnership liquidation, expected initial term (in years)	10 years
Number of equity method investments \| investment	9
Investments in privately held entities that report NAV
Net Investment Income [Line Items]
Weighted-average remaining liquidation term (in years)	7 years 10 months 24 days
Investments in privately held entities that do not report NAV \| Entities with observable price change
Net Investment Income [Line Items]
Investment in privately held entities that do not report NAV, cumulative price adjustments	$ (122,800)
Investments in privately held entities that do not report NAV, cumulative upward price adjustment	58,600
Investments in privately held entities that do not report NAV, cumulative downward price adjustment	(11,200)
Investments in privately held entities that do not report NAV, cumulative impairment loss	$ (170,200)

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