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Summary of Reconciliation of Disaggregated Revenue by Primary Geographical Market (Detail) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | $ 1,541,320 | $ 1,541,189
Contract Drilling Services [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | 1,399,068 | 1,396,492
Completion and Production Services [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | 147,829 | 150,760
Inter- Segment Eliminations [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | (5,577) | (6,063)
Canada [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | 459,377 | 558,746
Canada [Member] | Contract Drilling Services [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | 336,483 | 426,475
Canada [Member] | Completion and Production Services [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | 128,202 | 138,030
Canada [Member] | Inter- Segment Eliminations [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | (5,308) | (5,759)
United States [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | 871,651 | 791,312
United States [Member] | Contract Drilling Services [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | 852,293 | 778,886
United States [Member] | Completion and Production Services [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | 19,627 | 12,730
United States [Member] | Inter- Segment Eliminations [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | (269) | (304)
International [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | 210,292 | 191,131
International [Member] | Contract Drilling Services [Member] |  |
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items] |  |
Revenue | $ 210,292 | $ 191,131

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Expiry date 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants. Effective 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 28 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_28_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 23 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_23_a&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 32 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_32&doctype=Standard -URIDate 2019-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 33 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_33_a&doctype=Standard -URIDate 2019-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 34 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_34&doctype=Standard -URIDate 2019-03-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 82 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_82_a&doctype=Standard -URIDate 2019-03-27 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_103&doctype=Standard -URIDate 2019-03-27 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_102&doctype=Standard -URIDate 2019-03-27 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 5 -IssueDate 2019-01-01 -Paragraph 33 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=5&code=ifrs-tx-2019-en-r&anchor=para_33_b_i&doctype=Standard -URIDate 2019-03-27 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph B12 -Subparagraph b -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B12_b_v&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 11: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph B10 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B10_b&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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