Derivative Financial Instruments - Schedule of Offsetting Assets / Offsetting Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Derivative Assets
Derivative Assets	$ 323,705	$ 296,848	$ 313,480
Derivative Liabilities
Gross Amounts Recognized	458,706	338,078	357,170
Interest rate contract
Derivative Assets
Derivative Assets	312,253	286,438	299,298
Less: Amounts offset in the Statements of Condition	0	0	0
Net amount presented in the Statements of Condition	312,253	286,438	299,298
Offsetting Derivative Positions	(157,673)	(64,100)	(74,101)
Collateral Posted	(140,857)	(194,666)	(204,260)
Net Credit Exposure	13,723	27,672	20,937
Derivative Liabilities
Gross Amounts Recognized	453,271	329,307	353,426
Less: Amounts offset in the Statements of Condition	0	0	0
Net amount presented in the Statements of Condition	453,271	329,307	353,426
Offsetting Derivative Positions	(157,673)	(64,100)	(74,101)
Collateral Posted	(3,785)	0	0
Net Credit Exposure	$ 291,813	$ 265,207	$ 279,325