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Consolidated Statements of Net Earnings (Loss) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Income Statement [Abstract] |  |
Revenue | $ 935,753 | $ 1,541,320
Expenses: |  |
Operating | 583,420 | 1,038,967
General and administrative | 70,869 | 104,010
Restructuring | 18,061 | 6,438
Earnings before income taxes, gain on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, reversal of impairment of property, plant and equipment, loss on asset decommissioning, gain on asset disposals and depreciation and amortization | 263,403 | 391,905
Depreciation and amortization | 316,322 | 333,616
Gain on asset disposals | (11,931) | (50,741)
Loss on asset decommissioning |  | 20,263
Reversal of impairment of property, plant and equipment |  | (5,810)
Foreign exchange | 4,542 | (8,722)
Finance charges | 107,468 | 118,453
Gain on redemption and repurchase of unsecured senior notes | (43,814) | (6,815)
Loss before income taxes | (109,184) | (8,339)
Income taxes: |  |
Current | 5,290 | 1,080
Deferred | 5,664 | (16,037)
Income tax recovery | 10,954 | (14,957)
Net earnings (loss) | $ (120,138) | $ 6,618
Net earnings (loss) per share: |  |
Basic | $ (8.76) | $ 0.46
Diluted | $ (8.76) | $ 0.45

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- Definition The amount of expense relating to selling, general and administrative activities of the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_85&doctype=Standard -URIDate 2020-01-01 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Earnings before income taxes gain on redemption and repurchase of financial instruments. + References No definition available. + Details
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Namespace Prefix: | pds_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Gain (loss) on redemption and repurchase of unsecured senior notes. + References No definition available. + Details
Name: | pds_GainLossOnRedemptionAndRepurchaseOfUnsecuredSeniorNotes
Namespace Prefix: | pds_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Losses on asset decommissioning. + References No definition available. + Details
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Namespace Prefix: | pds_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration