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Supplemental Executive Retirement Plan (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
installment
age
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
insuranceCarrier
Dec. 31, 2013
USD ($)
insuranceCarrier
Defined Benefit Plan Disclosure [Line Items]        
Defined benefit plan, net periodic benefit cost $ 338 $ 428 $ 404  
Annuity contract financed payments period (in years) 15 years      
Supplemental Executive Retirement and Death Benefit Agreements        
Defined Benefit Plan Disclosure [Line Items]        
Time period for calculating base salary under SERP agreements (in years) 5 years      
Retirement age (in years) | age 67      
Award vesting period (in years) 6 years      
Retirement plan monthly instalments | installment 180      
Purchased Fixed Annuity for Financing Retirement Benefits | Supplemental Executive Retirement and Death Benefit Agreements        
Defined Benefit Plan Disclosure [Line Items]        
Number of insurance carriers | insuranceCarrier     2 4
Other investments     $ 2,600 $ 11,400
Purchased Fixed Annuity for Financing Retirement Benefits | Supplemental Executive Retirement and Death Benefit Agreements | Other Assets        
Defined Benefit Plan Disclosure [Line Items]        
Cash surrender value of life insurance $ 14,200 $ 14,500