XML 73 R78.htm IDEA: XBRL DOCUMENT v3.19.3
Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Defined Benefit Pension Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 923 $ 1,014 $ 3,557 $ 3,206
Interest cost 4,812 4,494 14,478 13,691
Expected return on plan assets (5,402) (5,621) (16,280) (16,952)
Amortization of prior service cost (credit) 16 7 48 23
Recognized actuarial loss (gain) 1,832 2,125 5,496 6,648
Settlement loss 0 0 0 2,443
Net periodic benefit cost (credit) 2,181 2,019 7,299 9,059
Postretirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 1 0 1 1
Interest cost 50 52 150 156
Amortization of prior service cost (credit) (510) (509) (1,528) (1,528)
Recognized actuarial loss (gain) (96) (80) (288) (240)
Net periodic benefit cost (credit) $ (555) $ (537) $ (1,665) $ (1,611)