XML 168 R141.htm IDEA: XBRL DOCUMENT v3.8.0.1
Retirement Plans (Schedule of Estimated Future Benefit Payments) (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Pension Plan  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2018 $ 6,001
2019 6,297
2020 6,392
2021 6,657
2022 6,787
2023 - 2027 35,689
Total 67,823
Postretirement Plan  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2018 230
2019 230
2020 231
2021 230
2022 227
2023 - 2027 973
Total 2,121
SERP  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2018 2,063
2019 22
2020 22
2021 22
2022 22
2023 - 2027 107
Total $ 2,258