Defined Benefit Pension Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	$ 515	$ 593	$ 1,031	$ 1,185
Interest cost	[2]	592	357	1,184	1,002
Expected return on plan assets	[2]	(1,158)	(1,204)	(2,317)	(2,408)
Recognized net actuarial loss	[2]	255	673	510	1,060
Net periodic benefit cost		204	419	408	839
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	55	52	109	104
Interest cost	[2]	106	85	212	169
Expected return on plan assets	[2]	0	0	0	0
Recognized net actuarial loss	[2]	173	204	346	362
Net periodic benefit cost		$ 334	$ 341	$ 667	$ 635

[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.