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Long-term Debt and Other Long-Term Liabilities - Summary of Principal Repayments of Long-term Debt (Details) - Long term Borrowings
$ in Thousands
Mar. 31, 2018
CAD ($)
Disclosure Of Detailed Information About Borrowings [Line Items]  
Principal repayments $ 8,422
2019  
Disclosure Of Detailed Information About Borrowings [Line Items]  
Principal repayments 1,547
2020  
Disclosure Of Detailed Information About Borrowings [Line Items]  
Principal repayments 2,048
2021  
Disclosure Of Detailed Information About Borrowings [Line Items]  
Principal repayments 2,537
2022  
Disclosure Of Detailed Information About Borrowings [Line Items]  
Principal repayments 1,588
2023  
Disclosure Of Detailed Information About Borrowings [Line Items]  
Principal repayments 263
Thereafter  
Disclosure Of Detailed Information About Borrowings [Line Items]  
Principal repayments $ 439