Defined Benefit Pension Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	$ 350	$ 515	$ 701	$ 1,031
Interest cost	[2]	887	592	1,771	1,184
Expected return on plan assets	[2]	(1,148)	(1,158)	(2,295)	(2,317)
Recognized net actuarial loss	[2]	0	255	0	510
Net periodic benefit cost		89	204	177	408
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	39	55	78	109
Interest cost	[2]	177	106	353	212
Expected return on plan assets	[2]	0	0	0	0
Recognized net actuarial loss	[2]	60	173	119	346
Net periodic benefit cost		$ 276	$ 334	$ 550	$ 667

[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.