XML 135 R111.htm IDEA: XBRL DOCUMENT v3.8.0.1
Employee Benefit Plans (Expected Contributions and Future Benefit Payments) (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
Employer Contributions  
Expected 2018 Contributions by Employer $ 3,898
Future Expected Benefit Payments  
2018 413
2019 676
2020 869
2021 983
2022 1,099
2023-2027 $ 7,672