Retirement Plans (Changes in Benefit Obligations, Components of Benefit Costs, Weighted-Average Assumptions, and Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assumptions (end of period):
Discount rate used in determining benefit obligation	4.93%	2.52%
Reconciliation of funded status (end of period):
Accumulated benefit obligation	$ (9,479)	$ (12,400)
Projected benefit obligation	(9,479)	(12,400)
Fair value of plan assets	9,642	12,226
Funded status	163	(174)
Net actuarial loss	(3,272)	(3,253)
Accumulated other comprehensive loss	(3,272)	(3,253)
Prepaid pension cost	3,435	3,079
Net amount recognized	163	(174)
Changes in projected benefit obligation:
Benefit obligation as of beginning of period	12,400	13,252
Interest cost	300	271
Actuarial liability loss	(2,473)	(284)
Benefits paid	(748)	(839)
Benefit obligation as of end of period	9,479	12,400	$ 13,252
Change in plan assets:
Fair value of plan assets as of beginning of period	12,226	11,393
Actual return on plan assets (net of expenses)	(1,836)	1,672
Employer contributions	0	0
Benefits Paid	(748)	(839)
Fair value of plan assets as of end of period	9,642	12,226	11,393
Net periodic pension cost:
Service cost - benefits earned during the period		0	$ 0
Interest cost	300	271
Expected return on plan assets	(763)	(709)
Recognized actuarial loss	107	173
Net periodic pension cost	$ (356)	$ (265)
Discount rate	4.93%	2.52%
Expected return on plan assets	6.50%	6.50%