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Other Investments - Summary of Other Investments (Details) - Equity Securities
$ in Thousands, $ in Thousands
 12 Months Ended
Mar. 04, 2019
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2020
CAD ($)
shares
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
Debt and Equity Securities, FV-NI [Line Items]          
Gain recognized in net income (loss)   $ 4,789   $ 16,277 $ 164
Canopy          
Debt and Equity Securities, FV-NI [Line Items]          
Gain recognized in net income (loss)   0   $ 51 $ 166
Investment owned, number of shares sold (in shares) | shares       11,062 18,436
Proceeds from sale of equity securities, FV-NI       $ 355 $ 530
Vivo Cannabis          
Debt and Equity Securities, FV-NI [Line Items]          
Gain recognized in net income (loss)   0   0 $ (173)
Investment owned, number of shares sold (in shares) | shares         182,927
Proceeds from sale of equity securities, FV-NI         $ 216
Number of securities called by warrants or rights (in shares) | shares         182,927
Proceeds from exercise of warrants         $ 87
Vivo Cannabis | Warrants          
Debt and Equity Securities, FV-NI [Line Items]          
Gain recognized in net income (loss)   0   0 171
Whistler          
Debt and Equity Securities, FV-NI [Line Items]          
Gain recognized in net income (loss)   $ 0   15,530 0
Investment owned, number of shares sold (in shares) | shares 2,563 980,662 980,662    
Investment owned, shares sold, percentage of shares issued and outstanding 19.00%        
Shares received (in shares) | shares   980,662 980,662    
Aurora          
Debt and Equity Securities, FV-NI [Line Items]          
Gain recognized in net income (loss)   $ 4,789 $ 6,404 $ 696 $ 0
Investment owned, number of shares sold (in shares) | shares       2,524,341  
Proceeds from sale of equity securities, FV-NI       $ 19,259  
Shares received (in shares) | shares 2,524,341