Annual report pursuant to Section 13 and 15(d)

Pension and Other Postretirement Benefits - Fair Values of Plan Assets by Major Asset Category (Details)

v3.24.0.1
Pension and Other Postretirement Benefits - Fair Values of Plan Assets by Major Asset Category (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets $ 14,201 $ 11,650 $ 10,713
Cash and cash equivalents — money markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 1,179 2,571  
Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 8,182 392  
Equity funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 401 2,884  
Fixed income funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 1,000 598  
Taxable bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 3,439 5,205  
Quoted Prices in Active Markets for Identical Assets (Level 1)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 14,201 11,650  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents — money markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 1,179 2,571  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 8,182 392  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 401 2,884  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 1,000 598  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Taxable bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 3,439 5,205  
Significant Other Observable Inputs (Level 2)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Other Observable Inputs (Level 2) | Cash and cash equivalents — money markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Other Observable Inputs (Level 2) | Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Other Observable Inputs (Level 2) | Equity funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Other Observable Inputs (Level 2) | Fixed income funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Other Observable Inputs (Level 2) | Taxable bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Unobservable Inputs (Level 3)      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Unobservable Inputs (Level 3) | Cash and cash equivalents — money markets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Unobservable Inputs (Level 3) | Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Unobservable Inputs (Level 3) | Equity funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Unobservable Inputs (Level 3) | Fixed income funds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets 0 0  
Significant Unobservable Inputs (Level 3) | Taxable bonds      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of Pension Plan assets $ 0 $ 0