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Employee Benefit Plans Projected Benefit Obligation (Details) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year $ 78,137,000    
Fair value of plan assets at end of year 84,659,000 $ 78,137,000  
Pension Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Projected benefit obligation at beginning of year 68,716,000 87,530,000  
Interest cost 3,269,000 2,393,000 $ 2,244,000
Benefit payments (4,687,000) (4,502,000)  
Change in assumptions 1,492,000 (17,131,000)  
Experience gain 162,000 426,000  
Projected benefit obligation at end of year 68,952,000 68,716,000 87,530,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 78,137,000 94,115,000  
Actual return on plan assets 11,209,000 (11,476,000)  
Fair value of plan assets at end of year 84,659,000 78,137,000 94,115,000
Other Postretirement Benefit Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Projected benefit obligation at beginning of year 972,000 1,244,000  
Interest cost 42,000 34,000 32,000
Benefit payments (147,000) (155,000)  
Change in assumptions 8,000 (202,000)  
Experience gain 31,000 (51,000)  
Projected benefit obligation at end of year 844,000 972,000 $ 1,244,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year $ 0 $ 0