Quarterly report pursuant to Section 13 or 15(d)

Employee Retirement Plans - Reconciliations (Details)

v3.20.2
Employee Retirement Plans - Reconciliations (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Pension plan              
Component of net periodic cost:              
Interest cost     $ 410   $ 1,230    
Expected return on plan assets     (294)   (882)    
Amortization of net (gain) loss     149   447    
Net periodic pension cost     265   795    
Defined Benefit Plan Termination, Payments by Employer   $ 464          
Employer contributions during the period           $ 0  
Defined Benefit Plan Employer Discretionary Contribution Amount             $ 7,000
Other postretirement benefit cost              
Component of net periodic cost:              
Service cost $ 37   37 $ 111 111    
Interest cost 47   63 141 189    
Amortization of net (gain) loss (77)   (78) (231) (234)    
Net periodic pension cost $ 7   $ 22 $ 21 $ 66