Quarterly report pursuant to Section 13 or 15(d)

Employee Retirement Plans (Details)

v3.19.2
Employee Retirement Plans (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Pension plan        
Components of net periodic cost:        
Service cost   $ 102   $ 204
Interest cost $ 410 389 $ 820 778
Expected return on plan assets (294) (475) (588) (950)
Amortization of net (gain) loss 149 176 298 352
Net periodic pension cost 265 192 530 384
Employer contributions during the period     0 31
Pension plan | Minimum        
Components of net periodic cost:        
Estimated total required contributions 0   0  
Other postretirement benefit cost        
Components of net periodic cost:        
Service cost 37 47 74 94
Interest cost 63 58 126 116
Amortization of net (gain) loss (78) (52) (156) (104)
Net periodic pension cost $ 22 $ 53 $ 44 $ 106