XML 81 R70.htm IDEA: XBRL DOCUMENT v3.10.0.1
Employee Benefit Plans (Components Of Net Periodic Benefit Expense) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]        
Service cost $ 836 $ 785 $ 2,509 $ 2,355
Interest cost on projected benefit obligation 598 613 1,793 1,840
Expected return on plan assets (1,321) (1,193) (3,963) (3,581)
Amortization of unrecognized prior service credit (18) (12) (54) (38)
Amortization of unrecognized net actuarial loss 188 291 563 874
Net periodic benefit expense $ 283 $ 484 $ 848 $ 1,450