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Post Retirement Benefits - Schedule of in Benefit Obligation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Change in benefit obligation:      
Interest cost $ 161 $ 235 $ 285
Post Retirement Benefits      
Change in benefit obligation:      
Benefit obligation at beginning of year 9,109 9,160  
Interest cost 161 237  
Unrecognized loss (gain) 79 (102)  
Benefits paid, net (269) (186)  
Benefit obligation at beginning of year 9,080 9,109 $ 9,160
Plan Assets 0 0  
Amounts recorded in accumulated other comprehensive income:      
Prior service credit (4,618) (5,114)  
Net loss 3,257 3,351  
Total $ (1,361) $ (1,763)  
Weighted-average assumptions      
Discount rate used to determine benefit obligation and net periodic benefit cost 2.50% 2.00%