XML 81 R54.htm IDEA: XBRL DOCUMENT v3.20.4
Exploration and Evaluation Assets - Impairment Booked for Cash Generating Untis (Details) - Exploration and evaluation assets - CAD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Exploration For And Evaluation Of Mineral Resources [Abstract]    
Impairment loss on financial assets $ 127,861  
Disclosure of detailed information about property, plant and equipment [line items]    
Impairment loss on financial assets 127,861  
Conventional CGU    
Exploration For And Evaluation Of Mineral Resources [Abstract]    
Impairment loss on financial assets 4,000  
Disclosure of detailed information about property, plant and equipment [line items]    
Impairment loss on financial assets 4,000  
Peace River CGU    
Exploration For And Evaluation Of Mineral Resources [Abstract]    
Impairment loss on financial assets 20,000 $ 7,800
Disclosure of detailed information about property, plant and equipment [line items]    
Impairment loss on financial assets 20,000 $ 7,800
Lloydminster CGU    
Exploration For And Evaluation Of Mineral Resources [Abstract]    
Impairment loss on financial assets 42,000  
Disclosure of detailed information about property, plant and equipment [line items]    
Impairment loss on financial assets 42,000  
Viking CGU    
Exploration For And Evaluation Of Mineral Resources [Abstract]    
Impairment loss on financial assets 13,000  
Disclosure of detailed information about property, plant and equipment [line items]    
Impairment loss on financial assets 13,000  
Eagle Ford CGU    
Exploration For And Evaluation Of Mineral Resources [Abstract]    
Impairment loss on financial assets 48,861  
Disclosure of detailed information about property, plant and equipment [line items]    
Impairment loss on financial assets $ 48,861