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Derivative Financial Instruments (Location and Fair Value of Derivative Instruments) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Derivatives not designated as hedging instruments, fair value
Derivatives	$ 54,612,000	$ 68,581,000
Derivatives	$ 49,012,000	$ 61,419,000
Interest rate swap agreements on loans with commercial loan customers | Not Designated as Hedging Instrument
Derivatives not designated as hedging instruments, fair value
Derivative Asset, Number of Instruments Held	10	2
Derivative Asset, Notional Amount	$ 143,681,000	$ 65,352,000
Derivative Asset, Average Remaining Maturity	7 years 4 months 2 days	4 years 9 months 29 days
Derivatives	$ 3,254,000	$ 1,010,000
Derivative Liability, Number of Instruments Held	76	82
Derivative Liability, Notional Amount	$ 644,071,000	$ 678,881,000
Derivative Liability, Average Remaining Maturity	6 years 8 months 19 days	7 years 7 months 9 days
Derivatives	$ 49,012,000	$ 61,419,000
Interest rate swap agreements on loans with third-party counter parties | Not Designated as Hedging Instrument
Derivatives not designated as hedging instruments, fair value
Derivative Asset, Number of Instruments Held	86	84
Derivative Asset, Notional Amount	$ 787,752,000	$ 744,233,000
Derivative Asset, Average Remaining Maturity	6 years 10 months 2 days	7 years 4 months 13 days
Derivatives	$ 45,758,000	$ 60,409,000
Interest rate swap related to AFS securities | Designated as Hedging Instrument
Derivatives not designated as hedging instruments, fair value
Derivative Asset, Number of Instruments Held	11	11
Derivative Asset, Notional Amount	$ 12,500,000	$ 12,500,000
Derivative Asset, Average Remaining Maturity	9 years 10 days	9 years 3 months 10 days
Derivatives	$ 426,000	$ 602,000
Interest rate swap related to FHLB borrowings | Designated as Hedging Instrument
Derivatives not designated as hedging instruments, fair value
Derivative Asset, Number of Instruments Held	10	11
Derivative Asset, Notional Amount	$ 106,400,000	$ 116,400,000
Derivative Asset, Average Remaining Maturity	2 years 10 months 17 days	2 years 10 months 17 days
Derivatives	$ 5,174,000	$ 6,560,000

X

- Definition

Average remaining period until maturity of the derivative asset contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Average remaining period until maturity of the derivative liability contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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Nominal or face amount used to calculate payments on the derivative asset.

+ References

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The number of derivative instruments of a particular derivative asset or group of derivative assets held by the entity.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Nominal or face amount used to calculate payments on the derivative liability.

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