Annual report pursuant to Section 13 and 15(d)

Employee Retirement Plans - Reconciliations (Details)

v3.20.4
Employee Retirement Plans - Reconciliations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Component of net periodic cost:      
Effect of settlement for termination   $ 6,380  
Amounts recognized in the consolidated balance sheets consisted      
Retiree health benefit obligation $ 15,804 14,017  
Pension plan      
Component of net periodic cost:      
Service cost     $ 409
Interest cost   1,642 1,555
Expected return on plan assets   (1,175) (1,901)
Amortization of net (gain) loss   595 706
Effect of settlement for termination   6,380  
Net periodic pension cost   7,442 769
Employer contributions during the period   460  
Change in projected benefit obligation:      
Benefit obligation at beginning of year   40,182  
Actuarial (gain) loss   166  
Benefits paid   (1,451)  
Benefit obligation at end of year     40,182
Change in plan assets:      
Fair value of plan assets at beginning of year   38,053  
Actual return on plan assets   3,477  
Benefits paid   (1,451)  
Pension settlement   (40,539)  
Fair value of plan assets at end of year     38,053
Funded status at end of year    
Salaried Pension Plan      
Accumulated benefit obligation   0 40,182
Pension plan | Minimum      
Component of net periodic cost:      
Employer contributions during the period   0  
Other postretirement benefit cost      
Component of net periodic cost:      
Service cost 147 149 189
Interest cost 191 252 233
Amortization of net (gain) loss (310) (312) (211)
Net periodic pension cost 28 89 211
Change in projected benefit obligation:      
Benefit obligation at beginning of year 6,538 6,420  
Participant contributions 55 38  
Actuarial (gain) loss (178) (266)  
Benefits paid (17) (55)  
Benefit obligation at end of year 6,736 6,538 $ 6,420
Change in plan assets:      
Benefits paid $ (17) (55)  
Period of coverage under the plan 10 years    
Amounts recognized in the consolidated balance sheets consisted      
Accrued expenses and other current liabilities $ 250 200  
Retiree health benefit obligation 6,486 6,338  
Amounts recognized in the consolidated balance sheets $ 6,736 $ 6,538  
Salaried Pension Plan      
Period of service of employees 12 years