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Summary of Operating Segments (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of operating segments [Line Items] |  |
Revenue | $ 1,541,320 | $ 1,541,189
Operating earnings (loss) | (8,339) | (323,596)
Depreciation and amortization | 333,616 | 377,044
Impairment of goodwill |  | 207,544
Total assets | 3,269,840 | 3,636,043
All Other Segments [Member] |  |
Disclosure of operating segments [Line Items] |  |
Revenue | 1,541,320 | 1,541,189
Operating earnings (loss) | 94,577 | (198,073)
Depreciation and amortization | 333,616 | 377,044
Loss (gain) on asset disposals | (50,741) | (11,384)
Impairment of goodwill |  | 207,544
Loss on asset decommissioning | 20,263 |
Reversal of impairment of property, plant and equipment | (5,810) |
Total assets | 3,269,840 | 3,636,043
Capital expenditures | 160,694 | 126,143
Contract Drilling Services [Member] |  |
Disclosure of operating segments [Line Items] |  |
Revenue | 1,399,068 | 1,396,492
Contract Drilling Services [Member] | All Other Segments [Member] |  |
Disclosure of operating segments [Line Items] |  |
Revenue | 1,399,068 | 1,396,492
Operating earnings (loss) | 160,997 | (129,965)
Depreciation and amortization | 300,882 | 341,712
Loss (gain) on asset disposals | (46,849) | (7,157)
Impairment of goodwill |  | 207,544
Loss on asset decommissioning | 20,263 |
Reversal of impairment of property, plant and equipment | (5,810) |
Total assets | 2,963,260 | 3,301,457
Capital expenditures | 154,066 | 108,610
Completion and Production Services [Member] |  |
Disclosure of operating segments [Line Items] |  |
Revenue | 147,829 | 150,760
Completion and Production Services [Member] | All Other Segments [Member] |  |
Disclosure of operating segments [Line Items] |  |
Revenue | 147,829 | 150,760
Operating earnings (loss) | 10,041 | (8,998)
Depreciation and amortization | 17,881 | 22,801
Loss (gain) on asset disposals | (3,767) | 1,078
Total assets | 152,611 | 170,113
Capital expenditures | 5,448 | 5,004
Corporate and Other [Member] | All Other Segments [Member] |  |
Disclosure of operating segments [Line Items] |  |
Operating earnings (loss) | (76,461) | (59,110)
Depreciation and amortization | 14,853 | 12,531
Loss (gain) on asset disposals | (125) | (5,305)
Total assets | 153,969 | 164,473
Capital expenditures | 1,180 | 12,529
Inter- Segment Eliminations [Member] |  |
Disclosure of operating segments [Line Items] |  |
Revenue | (5,577) | (6,063)
Inter- Segment Eliminations [Member] | All Other Segments [Member] |  |
Disclosure of operating segments [Line Items] |  |
Revenue | $ (5,577) | $ (6,063)

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