Derivative Financial Instruments (Summary of Interest Rate Derivatives) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Derivative Assets
Gross Amounts Recognized	$ 296,848	$ 165,008
Derivative Liabilities
Gross Amounts Recognized	338,078	123,000
Interest rate contract
Derivative Assets
Gross Amounts Recognized	286,438	152,493
Less: Amounts offset in the Statements of Condition	0	0
Net amount presented in the Statements of Condition	286,438	152,493
Offsetting Derivative Positions	(64,100)	(52,832)
Collateral Posted	(194,666)	(3,530)
Net Credit Exposure	27,672	96,131
Derivative Liabilities
Gross Amounts Recognized	329,307	119,907
Less: Amounts offset in the Statements of Condition	0	0
Net amount presented in the Statements of Condition	329,307	119,907
Offsetting Derivative Positions	(64,100)	(52,832)
Collateral Posted	0	(55,201)
Net Credit Exposure	$ 265,207	$ 11,874