Derivatives - Schedule of Notional Amounts and The Gross Fair Values of RPAs Sold and Purchased Outstanding (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Derivative [Line Items]
Derivative assets - Fair value	$ 468,056	$ 523,133
Derivative liabilities - Fair value	436,446	545,885
Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	23,091,729	22,375,840
Derivative assets - Fair value	426,836	517,486
Derivative liabilities - Fair value	433,315	510,674
Credit contracts | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	210,170	168,999
Derivative assets - Fair value	17	1
Derivative liabilities - Fair value	31	12
Credit contracts | Derivatives not designated as hedging instruments | RPAs — protection sold
Derivative [Line Items]
Notional Amount	133,634	133,174
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	$ 31	$ 12
Weighted average remaining maturity of outstanding RPAs	1 year 7 months 6 days	1 year 7 months 6 days
Credit contracts | Derivatives not designated as hedging instruments | RPAs — protection purchased
Derivative [Line Items]
Notional Amount	$ 76,536	$ 35,825
Derivative assets - Fair value	17	1
Derivative liabilities - Fair value	$ 0	$ 0