Employee Benefits (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (on a pre-tax basis):
Net (gain) loss		$ (4,934)	$ (5,908)	$ 5,093
Recognized in other comprehensive income (loss)		6,646	8,752	(2,952)
Qualified Pension Plan [Member]
Net Periodic Benefit Cost:
Service cost	[1]	2,062	2,369	2,164
Interest cost	[2]	2,368	2,004	2,505
Expected return on plan assets	[2]	(4,634)	(4,815)	(4,538)
Recognized net actuarial loss	[2]	1,020	2,121	1,582
Net periodic benefit cost		816	1,679	1,713
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (on a pre-tax basis):
Net (gain) loss		(2,074)	(8,132)	1,708
Recognized in other comprehensive income (loss)		(2,074)	(8,132)	1,708
Total recognized in net periodic benefit cost and other comprehensive income (loss)		(1,258)	(6,453)	3,421
Non-Qualified Retirement Plans [Member]
Net Periodic Benefit Cost:
Service cost	[1]	218	208	170
Interest cost	[2]	423	337	465
Expected return on plan assets	[2]	0	0	0
Recognized net actuarial loss	[2]	692	723	560
Net periodic benefit cost		1,333	1,268	1,195
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (on a pre-tax basis):
Net (gain) loss		(4,572)	(621)	1,244
Recognized in other comprehensive income (loss)		(4,572)	(621)	1,244
Total recognized in net periodic benefit cost and other comprehensive income (loss)		$ (3,239)	$ 647	$ 2,439

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

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