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Note 16 - Income Tax - Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income tax expense using combined statutory rate of 26.5% (2019 - 26.5%, 2018 - 26.5%) $ 38,545 $ (53,128)
Permanent differences 820 1,566
Tax effect of flow through entities (307)
Adjustments to tax liabilities for prior periods 882 (328)
Non-deductible stock-based compensation 3,081 2,153
Excess tax benefits related to stock-based compensation (3,672)
Foreign, state and provincial tax rate differential (7,463) (2,402)
Settlement of long-term incentive arrangement 83,310
Other taxes (45)
Total $ 35,865 $ 27,147