XML 113 R102.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Employee Benefit Plans (Multi-employer Estimated Projected Benefit Payments) (Details) - Other Postretirement Benefit Plan
$ in Thousands
Dec. 31, 2019
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
2020 $ 133
2021 129
2022 121
2023 113
2024 106
2025 and thereafter $ 436