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Income Taxes and Deferred Income Taxes - Summary of Components of Deferred Tax (Details) - USD ($)
$ in Thousands
May 31, 2022
May 31, 2021
May 31, 2020
Deferred assets      
Operating loss carryforwards - Canada $ 132,293 $ 152,382 $ 20,512
Capital loss carryforwards 38,087 1,350 1,854
Intangible assets 150,543 86,541  
Property and equipment 20,592 17,107  
Currently nondeductible interest 7,165 9,491  
Partnership interests   34,108  
Deferred financing costs 1,638 4,237 5,022
Investment tax credits and related pool balance 21,590 526  
Other 44,393 26,434 1,704
Total Deferred tax assets 509,775 397,297 38,129
Less valuation allowance (354,071) (265,940) (4,583)
Net deferred tax assets 155,704 131,357 33,546
Deferred tax liabilities      
Property and equipment (38,387) (15,997) (8,356)
Intangible assets (305,577) (376,228) (69,580)
Convertible Senior Notes Due 2023 (8,378) (4,977) (4,056)
Total deferred tax liabilities (352,342) (397,202) (81,992)
Net deferred tax liability (196,638) (265,845) (48,446)
United States      
Deferred assets      
Operating loss carryforwards 77,868 57,320  
Other Countries      
Deferred assets      
Operating loss carryforwards $ 15,606 $ 7,801 $ 9,037