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Income Taxes - Operating Loss Carryforward Expirations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2018
Operating Loss Carryforwards [Line Items]    
Total $ 70,822  
Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 52,064  
Capital loss carryforwards   $ 102,057
U.S.    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards   2,123
Expiring net operating loss carryforwards 15,728  
Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 2,968  
Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 62  
Australia    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards   $ 58,848
Tax Year 2020    
Operating Loss Carryforwards [Line Items]    
Total 22  
Tax Year 2020 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 0  
Tax Year 2020 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2020 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2020 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 22  
Tax Year 2021    
Operating Loss Carryforwards [Line Items]    
Total 4  
Tax Year 2021 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 0  
Tax Year 2021 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2021 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2021 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 4  
Tax Year 2022    
Operating Loss Carryforwards [Line Items]    
Total 1,659  
Tax Year 2022 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 0  
Tax Year 2022 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2022 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 1,653  
Tax Year 2022 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 6  
Tax Year 2023    
Operating Loss Carryforwards [Line Items]    
Total 391  
Tax Year 2023 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 0  
Tax Year 2023 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2023 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 385  
Tax Year 2023 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 6  
Tax Year 2024    
Operating Loss Carryforwards [Line Items]    
Total 6  
Tax Year 2024 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 0  
Tax Year 2024 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2024 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2024 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 6  
Tax Year 2025    
Operating Loss Carryforwards [Line Items]    
Total 89  
Tax Year 2025 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 0  
Tax Year 2025 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2025 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 83  
Tax Year 2025 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 6  
Tax Year 2026    
Operating Loss Carryforwards [Line Items]    
Total 1,879  
Tax Year 2026 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 1,027  
Tax Year 2026 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2026 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 847  
Tax Year 2026 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 5  
Tax Year 2027    
Operating Loss Carryforwards [Line Items]    
Total 854  
Tax Year 2027 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 847  
Tax Year 2027 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2027 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2027 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 7  
Tax Year 2028    
Operating Loss Carryforwards [Line Items]    
Total 5,245  
Tax Year 2028 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 5,245  
Tax Year 2028 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2028 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2028 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2029    
Operating Loss Carryforwards [Line Items]    
Total 4,022  
Tax Year 2029 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 4,022  
Tax Year 2029 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2029 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2029 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2030    
Operating Loss Carryforwards [Line Items]    
Total 6,793  
Tax Year 2030 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 5,032  
Tax Year 2030 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 1,761  
Tax Year 2030 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2030 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2031    
Operating Loss Carryforwards [Line Items]    
Total 7,213  
Tax Year 2031 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 3,806  
Tax Year 2031 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 3,407  
Tax Year 2031 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2031 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2032    
Operating Loss Carryforwards [Line Items]    
Total 8,720  
Tax Year 2032 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 6,397  
Tax Year 2032 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 2,323  
Tax Year 2032 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2032 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2033    
Operating Loss Carryforwards [Line Items]    
Total 9,283  
Tax Year 2033 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 6,185  
Tax Year 2033 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 3,098  
Tax Year 2033 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2033 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2034    
Operating Loss Carryforwards [Line Items]    
Total 4,420  
Tax Year 2034 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 4,420  
Tax Year 2034 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2034 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2034 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax year 2035    
Operating Loss Carryforwards [Line Items]    
Total 3,731  
Tax year 2035 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 3,729  
Tax year 2035 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 2  
Tax year 2035 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax year 2035 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2036    
Operating Loss Carryforwards [Line Items]    
Total 5,454  
Tax Year 2036 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 2,799  
Tax Year 2036 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 2,655  
Tax Year 2036 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2036 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2037    
Operating Loss Carryforwards [Line Items]    
Total 4,398  
Tax Year 2037 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 1,916  
Tax Year 2037 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 2,482  
Tax Year 2037 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2037 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2038    
Operating Loss Carryforwards [Line Items]    
Total 2,666  
Tax Year 2038 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 2,666  
Tax Year 2038 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2038 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2038 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2039    
Operating Loss Carryforwards [Line Items]    
Total 3,338  
Tax Year 2039 | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 3,338  
Tax Year 2039 | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2039 | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2039 | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2040 [Member]    
Operating Loss Carryforwards [Line Items]    
Total 635  
Tax Year 2040 [Member] | Canada    
Operating Loss Carryforwards [Line Items]    
Expiring noncapital loss carryforwards 635  
Tax Year 2040 [Member] | U.S.    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2040 [Member] | Mexico    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards 0  
Tax Year 2040 [Member] | Barbados    
Operating Loss Carryforwards [Line Items]    
Expiring net operating loss carryforwards $ 0