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Employee Benefit Plans - Reconciliation of Benefit Obligations and Change in Benefit Obligation (Details) - SERP - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Change in Benefit Obligation:      
Projected benefit obligation at beginning of year $ 30,807 $ 36,089  
Service cost 1,248 1,191 $ 1,392
Interest cost 1,644 1,022 915
Actuarial (gain) loss 840 (6,522)  
Benefits paid (945) (973)  
Projected benefit obligation at end of year 33,594 30,807 $ 36,089
Changes in Plan Assets:      
Fair value of plan assets at beginning of year 0    
Fair value of plan assets at end of year 0 0  
Funded Status:      
Net amount recognized as accrued pension cost $ (33,594) $ (30,807)