Defined Benefit Pension Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	$ 351	$ 516	$ 1,052	$ 1,547
Interest cost	[2]	884	592	2,655	1,776
Expected return on plan assets	[2]	(1,147)	(1,159)	(3,442)	(3,476)
Recognized net actuarial loss	[2]	0	255	0	765
Net periodic benefit cost		88	204	265	612
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	39	54	117	163
Interest cost	[2]	176	105	529	317
Expected return on plan assets	[2]	0	0	0	0
Recognized net actuarial loss	[2]	59	173	178	519
Net periodic benefit cost		$ 274	$ 332	$ 824	$ 999

[1] Included in salaries and employee benefits expense in the Unaudited Consolidated Statements of Income.

[2] Included in other expenses in the Unaudited Consolidated Statements of Income.