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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Taxes [Line Items]        
Pre-tax earnings (loss) $ 14,972 $ 4,384 $ 20,561 $ (51,368)
Effective tax rate     18.50% (6.90%)
US federal income tax statutory rate     21.00%  
Income tax expense $ 2,593 $ 428 $ 3,813 $ 3,535
Canada [Member]        
Income Taxes [Line Items]        
Effective tax rate     23.00%