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Note 15 - Income Tax - Provision for (Recovery of) Income Tax (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Current    
Current income tax expense (recovery) $ 73,761 $ 40,986
Deferred    
Deferred income tax expense (recovery) (17,444) 7,988
Total 56,317 48,974
Canada Revenue Agency [Member]    
Current    
Canada, current income tax expense (recovery) 9,494 8,401
Deferred    
Canada, deferred income tax expense (recovery) 375 431
Internal Revenue Service (IRS) [Member]    
Current    
United States, current income tax expense (recovery) 64,267 32,585
Deferred    
United States, deferred income tax expense (recovery) $ (17,819) $ 7,557