XML 100 R84.htm IDEA: XBRL DOCUMENT v3.20.4
Employee Benefit Plans (Components of Net Pension Cost (Income)) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]    
Service cost benefits earned during the period $ 58 $ 55
Interest cost on projected benefit obligation 257 312
Actual return on assets (395) (379)
Net amortization and deferral (20)  
Net periodic pension cost (100) (12)
Other Postretirement Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Net periodic pension cost $ 24 $ 29