SERP Benefits Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in plan assets
Fair value of plan assets at beginning of year	$ 19,100
Fair value of plan assets at end of year	20,300	$ 19,100
Supplemental Executive Retirement Plans [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	20,752	17,361	$ 14,963
Service cost	574	505	433
Interest cost	424	518	601
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(1,777)	2,843	1,850
Accumulated benefit obligation at end of year	19,498	20,752	17,361
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(475)	(475)	(486)
Change in plan assets
Employer contribution	475	475	486
Defined Benefit Plan, Plan Assets, Benefits Paid	(475)	(475)	(486)
Funded status at end of year	(19,498)	(20,752)	(17,361)
Assets for Plan Benefits, Defined Benefit Plan	0	0	0
Liabilities	(19,498)	(20,752)	(17,361)
Funded status at end of year	(19,498)	(20,752)	(17,361)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax [Abstract]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax	3,002	5,881	3,509
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax	43	218	494
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax	3,045	6,099	4,003
Information for plans with an accumulated benefit obligation in excess of plan assets
Projected benefit obligation	19,498	20,752	17,361
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation	19,498	20,752	17,361
Net periodic benefit cost
Service cost	574	505	433
Interest cost	424	518	601
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	174	276	276
Recognized net actuarial loss	1,103	471	46
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 2,275	$ 1,770	$ 1,356
Minimum [Member] | Supplemental Executive Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	1.28%	0.43%	2.00%
Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	0.43%	2.00%	3.24%
Maximum [Member] | Supplemental Executive Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.57%	2.18%	3.04%
Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.18%	3.04%	4.09%