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Retirement Plans - Schedule of DCP Related Compensation (Income) Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits        
Defined Contribution Plan Disclosure [Line Items]        
DCP related compensation (income) expense $ 50 $ 9 $ (115) $ 304