Employee Benefits (Schedule of Net Funded (Unfunded) Status) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Qualified Pension Plan [Member]
Change in Benefit Obligation:
Benefit obligation at beginning of period		$ 89,408	$ 94,742
Service cost	[1]	2,062	2,369	$ 2,164
Interest cost	[2]	2,368	2,004	2,505
Actuarial (gain) loss		(23,658)	(4,011)
Benefits paid		(3,422)	(5,556)
Administrative expenses		(102)	(140)
Benefit obligation at end of period		66,656	89,408	94,742
Change in Plan Assets:
Fair value of plan assets at beginning of period		103,047	101,929
Actual return on plan assets		(17,970)	6,814
Employer contributions		0	0
Benefits paid		(3,422)	(5,556)
Administrative expenses		(102)	(140)
Fair value of plan assets at end of period		81,553	103,047	101,929
Funded (unfunded) status at end of period (1)	[3]	14,897	13,639
Non-Qualified Retirement Plans [Member]
Change in Benefit Obligation:
Benefit obligation at beginning of period		17,717	17,973
Service cost	[1]	218	208	170
Interest cost	[2]	423	337	465
Actuarial (gain) loss		(3,880)	102
Benefits paid		(916)	(903)
Administrative expenses		0	0
Benefit obligation at end of period		13,562	17,717	17,973
Change in Plan Assets:
Fair value of plan assets at beginning of period		0	0
Actual return on plan assets		0	0
Employer contributions		916	903
Benefits paid		(916)	(903)
Administrative expenses		0	0
Fair value of plan assets at end of period		0	0	$ 0
Funded (unfunded) status at end of period (1)	[3]	$ (13,562)	$ (17,717)

[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.

[3] Funded status of the qualified pension plan is included in other assets in the Consolidated Balance Sheets. Unfunded status of the non-qualified retirement plans is included in other liabilities in the Consolidated Balance Sheets.