Employee Benefit Plans (Obligation and Funded Status of Pension and Postretirement Plans) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Change in benefit obligation
Benefit obligation at beginning of year	$ 1,884,000	$ 3,088,000
Service cost	0	0	$ 0
Interest cost	6,000	48,000	116,000
Actuarial (gains) losses	(4,000)	68,000
Participant contributions	0	0
Benefits paid	(1,014,000)	(1,320,000)
Benefit obligation at end of year	872,000	1,884,000	3,088,000
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Company contributions	1,014,000	1,320,000
Participant contributions	0	0
Benefits paid	(1,014,000)	(1,320,000)
Fair value of plan assets at end of year	0	0	0
Under funded status of plans at end of year	(872,000)	(1,884,000)
Postretirement Benefits
Change in benefit obligation
Benefit obligation at beginning of year	25,324,000	24,872,000
Service cost	302,000	221,000	365,000
Interest cost	546,000	719,000	854,000
Actuarial (gains) losses	(1,252,000)	452,000
Participant contributions	271,000	298,000
Benefits paid	(1,249,000)	(1,238,000)
Benefit obligation at end of year	23,942,000	25,324,000	24,872,000
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Company contributions	978,000	940,000
Participant contributions	271,000	298,000
Benefits paid	(1,249,000)	(1,238,000)
Fair value of plan assets at end of year	0	0	$ 0
Under funded status of plans at end of year	$ (23,942,000)	$ (25,324,000)