XML 23 R61.htm IDEA: XBRL DOCUMENT v3.19.3
Retirement Plans (Components of Net Periodic Benefit Cost) (Details) - Pension Plan [Member] - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Interest cost $ 3,376 $ 3,095 $ 10,129 $ 9,285
Expected return on plan assets (5,278) (5,681) (15,835) (17,044)
Amortization of unrecognized net actuarial loss 644 494 1,931 1,481
Total net periodic cost (benefit) [1] $ (1,258) $ (2,092) $ (3,775) $ (6,278)
[1] The components of net periodic pension cost (benefit) are included within "Loss and loss expense incurred" and "Other insurance expenses" on the Consolidated Statements of Income.