Derivatives - Schedule Of Notional Amounts And The Gross Fair Values Of RPAs Sold And Purchased Outstanding (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Derivative [Line Items]
Derivative assets - Fair value	$ 409,467	$ 523,133
Derivative liabilities - Fair value	385,973	545,885
Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	23,840,799	22,375,840
Derivative assets - Fair value	369,470	517,486
Derivative liabilities - Fair value	385,834	510,674
Credit Risk Contract | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	303,421	168,999
Derivative assets - Fair value	25	1
Derivative liabilities - Fair value	51	12
Credit Risk Contract | Derivatives not designated as hedging instruments | RPAs — protection sold
Derivative [Line Items]
Notional Amount	133,756	133,174
Derivative assets - Fair value	0	0
Derivative liabilities - Fair value	$ 51	$ 12
Weighted average remaining maturity of outstanding RPAs	2 years 8 months 12 days	1 year 7 months 6 days
Credit Risk Contract | Derivatives not designated as hedging instruments | RPAs — protection purchased
Derivative [Line Items]
Notional Amount	$ 169,665	$ 35,825
Derivative assets - Fair value	25	1
Derivative liabilities - Fair value	$ 0	$ 0