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Note 22 - Segmented Information - Revenues and Long-lived Assets by Geographic Location (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Revenues $ 2,772,415 $ 2,407,410
Total long-lived assets 1,362,254 1,275,509
UNITED STATES    
Revenues 2,441,025 2,184,789
Total long-lived assets 1,072,466 1,022,721
CANADA    
Revenues 331,390 222,621
Total long-lived assets $ 289,788 $ 252,788