Defined Benefit Pension Plans (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Qualified Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	$ 516	$ 592
Interest cost	[2]	592	645
Expected return on plan assets	[2]	(1,159)	(1,204)
Recognized net actuarial loss	[2]	255	387
Net periodic benefit cost		204	420
Non-Qualified Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	54	52
Interest cost	[2]	106	84
Expected return on plan assets	[2]	0	0
Recognized net actuarial loss	[2]	173	158
Net periodic benefit cost		$ 333	$ 294

[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.