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Recast of Prior Period Amounts | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Recast Of Prior Period Amounts [Abstract] |
Recast of Prior Period Amounts | NOTE 4. RECAST OF PRIOR PERIOD AMOUNTS During the third quarter of 2017, the Corporation changed its treatment of how certain amounts that were historically netted against operating expense should be classified. In particular, certain amounts that were historically netted against operating expenses are now treated as revenue, with a corresponding increase to operating expenses. The primary nature of these amounts related to additional labour charges to customers above our standard drilling crew configuration and subsistence allowances paid to the drilling crew which varies depending on whether the crews were staying in a camp or hotel and equipment rental. As a result previously reported revenues and operating expenses were understated by equivalent amounts. As well, to conform to current year presentation, certain immaterial reclassifications between operating and general administrative expenses have been made in the comparative periods. As a result of these reclassifications, we have recast the prior year comparative amounts as follows:
Year ended December 31, 2016 |  | As previously reported |  |  | Revenue reclassification |  |  | Expense reclassification |  |  | As recast |
Revenue |  | $ | 951,411 |  |  | $ | 51,822 |  |  | $ | — |  |  | $ | 1,003,233 |
Expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating |  |  | 607,295 |  |  |  | 51,822 |  |  |  | 2,598 |  |  |  | 661,715 |
General and administrative |  |  | 110,287 |  |  |  | — |  |  |  | (2,598 | ) |  |  | 107,689 |
Restructuring |  |  | 5,754 |  |  |  | — |  |  |  | — |  |  |  | 5,754 |
Earnings before income taxes, loss on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of property, plant and equipment, gain on re-measurement of property, plant and equipment and depreciation and amortization |  | $ | 228,075 |  |  | $ | — |  |  | $ | — |  |  | $ | 228,075 |
There is no impact on net loss and comprehensive loss and the consolidated statement of financial position, consolidated statement of changes in equity and the consolidated statement of cash flows remain unchanged as a result of this recast.

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- Definition The description of the nature of accounting errors in prior periods. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 8 -IssueDate 2016-01-13 -Paragraph 49 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=8&date=2016-03-30&anchor=para_49_a&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition Disclosure of recast of prior year comparative amounts. + References No definition available. + Details
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