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Benefit Plans - Net Periodic Benefit Credit (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Components of net periodic benefit cost (credit):      
Service cost $ 494 $ 821 $ 1,140
Interest cost 2,044 1,538 1,538
Expected return on plan assets (2,151) (2,596) (2,375)
Amortization of net loss (244) 3 245
Amortization of prior service cost (45) 0 0
Effect of curtailment 0 0 (2,032)
Net periodic benefit cost (credit) $ 98 $ (234) $ (1,484)
Defined Benefit Plan Net Periodic Benefit Cost Credit Interest Cost Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag Interest cost    
Defined Benefit Plan Net Periodic Benefit Cost Credit Expected Return Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag Expected return on plan assets    
Defined Benefit Plan Net Periodic Benefit Cost Credit Amortization Of Gain (Loss) Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag Amortization of net loss    
Defined Benefit Plan Net Periodic Benefit Cost Credit Amortization Of Prior Service Cost Credit Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag Amortization of prior service cost