Employee Benefits (Schedule of plan's funded status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Change in benefit projected obligation:
Projected benefit obligation at beginning of year	$ 23,055	$ 23,964
Interest cost	634	589
Actuarial gain	(5,874)	(842)
Benefits paid	(677)	(656)
Projected benefit obligation at end of year	17,138	23,055
Change in plan assets:
Fair value of plan assets at beginning of year	22,839	22,634
Actual return on plan assets	(5,256)	861
Contributions	0	0
Benefits paid	(677)	(656)
Fair value of plan assets at end of year	16,906	22,839
Funded status	(232)	(216)
Defined Benefit Pension Plan.
Change in plan assets:
Fair value of plan assets at beginning of year	22,839
Fair value of plan assets at end of year	$ 16,906	$ 22,839