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 6 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Pension plan              
Component of net periodic cost:              
Interest cost     $ 410   $ 820    
Expected return on plan assets     (294)   (588)    
Amortization of net (gain) loss     149   298    
Net periodic pension cost     265   530    
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 $ 74 74    
Interest cost 47   63 94 126    
Amortization of net (gain) loss (77)   (78) (154) (156)    
Net periodic pension cost $ 7   $ 22 $ 14 $ 44