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Expected Non-cancellable Operating Lease Payments (Detail) - CAD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Non-cancellable operating lease | $ 56,637 | $ 67,932
Less than one year [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Non-cancellable operating lease | 11,954 | 13,496
One to five years [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Non-cancellable operating lease | 33,566 | 36,639
More than five years [member] |  |
Disclosure of finance lease and operating lease by lessee [Line Items] |  |
Non-cancellable operating lease | $ 11,117 | $ 17,797

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