Employee Benefits (Schedule of plan's funded status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Change in benefit projected obligation:
Projected benefit obligation at beginning of year	$ 23,964	$ 20,953
Interest cost	589	670
Actuarial (gain) loss	(842)	2,941
Benefits paid	(656)	(600)
Projected benefit obligation at end of year	23,055	23,964
Change in plan assets:
Fair value of plan assets at beginning of year	22,634	20,628
Actual return on plan assets	861	2,606
Contributions	0	0
Benefits paid	(656)	(600)
Fair value of plan assets at end of year	22,839	22,634
Funded status	(216)	(1,330)
Defined Benefit Pension Plan.
Change in plan assets:
Fair value of plan assets at beginning of year	22,634
Fair value of plan assets at end of year	$ 22,839	$ 22,634