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Summary of Operating Segments (Detail) - CAD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of operating segments [Line Items] |  |  |
Revenue | $ 1,541,189 | $ 1,321,224 |
Operating loss | (323,596) | (232,057) |
Depreciation and amortization | 365,660 | 377,746 |
Impairment of goodwill | 207,544 |  |
Impairment of property, plant and equipment |  | 15,313 |
Total assets | 3,636,043 | 3,892,931 |
Goodwill |  | 205,167 | $ 207,399
All Other Segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | 1,541,189 | 1,321,224 |
Operating loss | (198,073) | (88,078) |
Depreciation and amortization | 365,660 | 377,746 |
Impairment of goodwill | 207,544 |  |
Impairment of property, plant and equipment |  | 15,313 |
Total assets | 3,636,043 | 3,892,931 |
Goodwill |  | 205,167 |
Capital expenditures | 126,143 | 98,002 |
Contract Drilling Services [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | 1,396,492 | 1,173,930 |
Contract Drilling Services [Member] | All Other Segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | 1,396,492 | 1,173,930 |
Operating loss | (129,965) | (6,930) |
Depreciation and amortization | 334,555 | 334,587 |
Impairment of goodwill | 207,544 |  |
Impairment of property, plant and equipment |  | 15,313 |
Total assets | 3,301,457 | 3,491,393 |
Goodwill |  | 205,167 |
Capital expenditures | 108,610 | 69,076 |
Completion and Production Services [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | 150,760 | 154,146 |
Completion and Production Services [Member] | All Other Segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | 150,760 | 154,146 |
Operating loss | (8,998) | (17,750) |
Depreciation and amortization | 23,879 | 29,638 |
Total assets | 170,113 | 209,353 |
Capital expenditures | 5,004 | 4,509 |
Corporate and Other [Member] | All Other Segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Operating loss | (59,110) | (63,398) |
Depreciation and amortization | 7,226 | 13,521 |
Total assets | 164,473 | 192,185 |
Capital expenditures | 12,529 | 24,417 |
Inter- Segment Eliminations [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | (6,063) | (6,852) |
Inter- Segment Eliminations [Member] | All Other Segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | $ (6,063) | $ (6,852) |

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