Investment Information - Other investments by strategy (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Other Investments [Line Items]
Other investments	$ 1,644,197	$ 1,973,550
Other investments
Schedule Of Other Investments [Line Items]
Other investments	1,043,184	1,432,553
Other investments | Lending
Schedule Of Other Investments [Line Items]
Other investments	405,871	536,345
Other investments | Investment grade fixed income
Schedule Of Other Investments [Line Items]
Other investments	271,143	147,810
Other investments | Term loan investments
Schedule Of Other Investments [Line Items]
Other investments	163,941	484,950
Other investments | Private equity
Schedule Of Other Investments [Line Items]
Other investments	123,266	91,126
Other investments | Energy
Schedule Of Other Investments [Line Items]
Other investments	22,627	81,692
Other investments | Credit related funds
Schedule Of Other Investments [Line Items]
Other investments	56,336	70,278
Other investments | Infrastructure
Schedule Of Other Investments [Line Items]
Other investments	$ 0	$ 20,352