Employee Benefits (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (on a pre-tax basis):
Net loss (gain)		$ 6,712	$ (4,934)	$ (5,908)
Recognized in other comprehensive income (loss)		(6,475)	6,646	8,752
Qualified Pension Plan [Member]
Net Periodic Benefit Cost:
Service cost	[1]	1,403	2,062	2,369
Interest cost	[2]	3,540	2,368	2,004
Expected return on plan assets	[2]	(4,590)	(4,634)	(4,815)
Recognized net actuarial loss	[2]	0	1,020	2,121
Net periodic benefit cost		353	816	1,679
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (on a pre-tax basis):
Net loss (gain)		6,991	(2,074)	(8,132)
Recognized in other comprehensive income (loss)		6,991	(2,074)	(8,132)
Total recognized in net periodic benefit cost and other comprehensive income (loss)		7,344	(1,258)	(6,453)
Non-Qualified Retirement Plans [Member]
Net Periodic Benefit Cost:
Service cost	[1]	156	218	208
Interest cost	[2]	706	423	337
Expected return on plan assets	[2]	0	0	0
Recognized net actuarial loss	[2]	237	692	723
Net periodic benefit cost		1,099	1,333	1,268
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (on a pre-tax basis):
Net loss (gain)		(516)	(4,572)	(621)
Recognized in other comprehensive income (loss)		(516)	(4,572)	(621)
Total recognized in net periodic benefit cost and other comprehensive income (loss)		$ 583	$ (3,239)	$ 647

[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.