XML 106 R90.htm IDEA: XBRL DOCUMENT v3.10.0.1
Pension and Other Post-Retirement Benefits Percentage Change in Assumed Health Care Cost Trend Rates (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components $ 40
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components (36)
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation 581
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation $ (550)