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Summary of Operating Segments (Detail) - CAD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of operating segments [Line Items] |  |  |
Revenue | $ 1,321,224 | $ 1,003,233 |
Operating loss | (232,057) | (308,586) |
Depreciation and amortization | 377,746 | 391,659 |
Impairment of property, plant and equipment | 15,313 |  |
Total assets | 3,892,931 | 4,324,214 |
Goodwill | 205,167 | 207,399 | $ 208,479
All Other Segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | 1,321,224 | 1,003,233 |
Operating loss | (88,078) | (155,979) |
Depreciation and amortization | 377,746 | 391,659 |
Impairment of property, plant and equipment | 15,313 |  |
Total assets | 3,892,931 | 4,324,214 |
Goodwill | 205,167 | 207,399 |
Capital expenditures | 98,002 | 203,472 |
Contract Drilling Services [Member] | All Other Segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | 1,173,930 | 907,821 |
Operating loss | (6,930) | (51,354) |
Depreciation and amortization | 334,587 | 348,005 |
Impairment of property, plant and equipment | 15,313 |  |
Total assets | 3,491,393 | 3,914,604 |
Goodwill | 205,167 | 207,399 |
Capital expenditures | 69,076 | 196,013 |
Completion and Production Services [Member] | All Other Segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | 154,146 | 100,049 |
Operating loss | (17,750) | (25,316) |
Depreciation and amortization | 29,638 | 29,272 |
Total assets | 209,353 | 217,064 |
Capital expenditures | 4,509 | 1,204 |
Corporate and Other [Member] | All Other Segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Operating loss | (63,398) | (79,309) |
Depreciation and amortization | 13,521 | 14,382 |
Total assets | 192,185 | 192,546 |
Capital expenditures | 24,417 | 6,255 |
Inter- Segment Eliminations [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | (16,567) | (10,629) |
Inter- Segment Eliminations [Member] | All Other Segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Revenue | $ (6,852) | $ (4,637) |

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