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Share Based Payments - Schedule of Number of Other Equity Instruments (Details)
 12 Months Ended
Dec. 31, 2018
CAD ($)
shares
Dec. 31, 2017
CAD ($)
shares
Dec. 31, 2016
CAD ($)
shares
Restricted share units      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Outstanding, beginning of the year (shares) 190,407 139,237 38,823
Granted during the year (shares) 102,855 51,170 110,940
Forfeited during the year (shares) (4,210) 0 (10,526)
Vested during the year (shares) (28,297) 0 0
Outstanding, end of the year (shares) 260,755 190,407 139,237
Weighted average fair value at measurement date, other equity instruments granted | $ $ 3.35 $ 5.96 $ 2.92
Performance share units      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Outstanding, beginning of the year (shares) 94,734 88,419 0
Granted during the year (shares) 0 6,315 157,892
Forfeited during the year (shares) (31,578) 0 (69,473)
Outstanding, end of the year (shares) 63,156 94,734 88,419
Weighted average fair value at measurement date, other equity instruments granted | $ $ 0 $ 3.33 $ 3.38