Precision Drilling (PDS) 40-F 9 Mar 20 2019 FY Annual report (Canada) Financial data

Document and Entity Information

Document and Entity Information	12 Months Ended
	Dec. 31, 2019shares
Cover [Abstract]
Document Type	40-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Trading Symbol	PDS
Entity Registrant Name	PRECISION DRILLING CORP
Entity Central Index Key	0001013605
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Common Stock, Shares Outstanding	277,299,804
Entity Emerging Growth Company	false
Entity Interactive Data Current	Yes
Entity Address, Address Line One	800, 525 - 8 Avenue, S.W
Entity Address, City or Town	Calgary
Entity Address, Postal Zip Code	T2P 1G1
Entity Address, State or Province	AB
Entity Address, Country	CA
Local Phone Number	(403) 716-4500
Security Exchange Name	NYSE
Title of 12(b) Security	Common Shares

Consolidated Statements of Fina

Consolidated Statements of Financial Position - CAD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash	$ 74,701	$ 96,626
Accounts receivable	310,204	372,336
Income tax recoverable	1,142
Inventory	31,718	34,081
Current assets excluding asset held for sale	417,765	503,043
Assets held for sale		19,658
Total current assets	417,765	522,701
Non-current assets:
Income taxes recoverable		2,449
Deferred tax assets	4,724	36,880
Property, plant and equipment	2,749,463	3,038,612
Intangibles	31,746	35,401
Right of use assets	66,142	0
Total non-current assets	2,852,075	3,113,342
Total assets	3,269,840	3,636,043
Current liabilities:
Accounts payable and accrued liabilities	199,478	274,489
Current portion of lease obligation	12,449
Income tax payable	4,142	7,673
Total current liabilities	216,069	282,162
Non-current liabilities:
Share based compensation	8,830	6,520
Provisions and other	9,959	10,577
Long-term debt	1,427,181	1,706,253
Lease obligation	54,980
Deferred tax liabilities	25,389	72,779
Total non-current liabilities	1,526,339	1,796,129
Shareholders’ equity:
Shareholders’ capital	2,296,378	2,322,280
Contributed surplus	66,255	52,332
Deficit	(969,456)	(978,874)
Accumulated other comprehensive income	134,255	162,014
Total shareholders’ equity	1,527,432	1,557,752
Total liabilities and shareholders’ equity	$ 3,269,840	$ 3,636,043

Consolidated Statements of Net

Consolidated Statements of Net Earnings (Loss) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenue	$ 1,541,320	$ 1,541,189
Expenses:
Operating	1,038,967	1,067,264
General and administrative	104,010	111,830
Restructuring	6,438	1,164
Other recoveries		(14,200)
Earnings before income taxes, gain on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of goodwill, reversal of impairment of property, plant and equipment, loss on asset decommissioning, gain on asset disposals and depreciation and amortization	391,905	375,131
Depreciation and amortization	333,616	377,044
Gain on asset disposals	(50,741)	(11,384)
Loss on asset decommissioning	20,263
Reversal of impairment of property, plant and equipment	(5,810)
Impairment of goodwill		207,544
Foreign exchange	(8,722)	4,017
Finance charges	118,453	127,178
Gain on redemption and repurchase of unsecured senior notes	(6,815)	(5,672)
Loss before income taxes	(8,339)	(323,596)
Income taxes:
Current	1,080	8,573
Deferred	(16,037)	(37,899)
Income tax recovery	(14,957)	(29,326)
Net earnings (loss)	$ 6,618	$ (294,270)
Net earnings (loss) per share:
Basic	$ 0.02	$ (1)
Diluted	$ 0.02	$ (1)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement Of Comprehensive Income [Abstract]
Net earnings (loss)	$ 6,618	$ (294,270)
Unrealized gain on translation of assets and liabilities of operations denominated in foreign currency	(106,781)	175,630
Foreign exchange loss on net investment hedge with U.S. denominated debt, net of tax	79,022	(145,226)
Comprehensive loss	$ (21,141)	$ (263,866)

Consolidated Statements of Cash

Consolidated Statements of Cash Flow - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operations:
Net earnings (loss)	$ 6,618	$ (294,270)
Adjustments for:
Long-term compensation plans	19,457	17,401
Depreciation and amortization	333,616	377,044
Gain on asset disposals	(50,741)	(11,384)
Loss on asset decommissioning	20,263
Reversal of impairment of property, plant and equipment	(5,810)
Impairment of goodwill		207,544
Foreign exchange	(8,585)	2,341
Finance charges	118,453	127,178
Gain on redemption and repurchase of unsecured senior notes	(6,815)	(5,672)
Income taxes	(14,957)	(29,326)
Other	(981)	(1,269)
Income taxes paid	(5,060)	(4,446)
Income taxes recovered	2,479	33,283
Interest paid	(116,655)	(108,622)
Interest received	1,370	1,412
Funds provided by operations	292,652	311,214
Changes in non-cash working capital balances	(4,493)	(17,880)
Cash provided by operations	288,159	293,334
Investments:
Purchase of property, plant and equipment	(159,886)	(114,576)
Purchase of intangibles	(808)	(11,567)
Proceeds on sale of property, plant and equipment	90,768	24,457
Changes in non-cash working capital balances	(4,574)	892
Cash used in investing activities	(74,500)	(100,794)
Financing:
Redemption and repurchase of unsecured senior notes	(198,387)	(168,722)
Repurchase of share capital	(25,902)
Debt amendment fees	(702)	(638)
Lease payments	(6,823)
Issuance of common shares on the exercise of options		275
Cash used in financing activities	(231,814)	(169,085)
Effect of exchange rate changes on cash and cash equivalents	(3,770)	8,090
Increase (decrease) in cash and cash equivalents	(21,925)	31,545
Cash and cash equivalents, beginning of year	96,626	65,081
Cash and cash equivalents, end of year	$ 74,701	$ 96,626

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - CAD ($) $ in Thousands	Total	Shareholders' Capital [Member]	Contributed Surplus [Member]	Accumulated Other Comprehensive Income [Member]	Deficit [Member]
Balance at Dec. 31, 2017	$ 1,810,336	$ 2,319,293	$ 44,037	$ 131,610	$ (684,604)
Net earnings (loss)	(294,270)				(294,270)
Other comprehensive income (loss)	30,404			30,404
Share options exercised	275	378	(103)
Redemption of non-management directors’ DSUs	1,800	2,609	(809)
Share based compensation expense	9,207		9,207
Balance at Dec. 31, 2018	1,557,752	2,322,280	52,332	162,014	(978,874)
Lease transition adjustment	2,800				2,800
Net earnings (loss)	6,618				6,618
Other comprehensive income (loss)	(27,759)			(27,759)
Share repurchase	(25,902)	(25,902)
Share based compensation expense	13,923		13,923
Balance at Dec. 31, 2019	$ 1,527,432	$ 2,296,378	$ 66,255	$ 134,255	$ (969,456)

Description of Business

Description of Business	12 Months Ended
	Dec. 31, 2019
Description Of Business [Abstract]
Description of Business	NOTE 1. DESCRIPTION OF BUSINESS Precision Drilling Corporation (Precision or the Corporation) is incorporated under the laws of the Province of Alberta, Canada and is a provider of contract drilling and completion and production services primarily to oil and natural gas exploration and production companies in Canada, the United States and certain international locations. The address of the registered office is 800, 525 – 8th Avenue S.W., Calgary, Alberta, Canada, T2P 1G1.

Basis of Preparation

Basis of Preparation	12 Months Ended
	Dec. 31, 2019
Basis Of Preparation [Abstract]
Basis of Preparation	NOTE 2. BASIS OF PREPARATION (a) Statement of Compliance The consolidated financial statements have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB). These consolidated financial statements were authorized for issue by the Board of Directors on March 6, 2020. (b) Basis of Measurement The consolidated financial statements have been prepared using the historical cost basis and are presented in thousands of Canadian dollars. (c) Use of Estimates and Judgments The preparation of the consolidated financial statements requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingencies. These estimates and judgments are based on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. The estimation of anticipated future events involves uncertainty and, consequently, the estimates used in preparation of the consolidated financial statements may change as future events unfold, more experience is acquired, or the Corporation’s operating environment changes. The Corporation reviews its estimates and assumptions on an ongoing basis. Adjustments that result from a change in estimate are recorded in the period in which they become known. Significant estimates and judgments used in the preparation of the financial statements are described in Note 3(d), (e), (g), (i), (j), (l), (s) and (t).

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Disclosure Of Significant Accounting Policies [Abstract]
Significant Accounting Policies	NOTE 3. SIGNIFICANT ACCOUNTING POLICIES (a) Basis of Consolidation These consolidated financial statements include the accounts of the Corporation and all of its subsidiaries and partnerships, substantially all of which are wholly-owned. The financial statements of the subsidiaries are prepared for the same period as the parent entity, using consistent accounting policies. All significant intercompany balances and transactions and any unrealized gains and losses arising from intercompany transactions, have been eliminated. Subsidiaries are entities controlled by the Corporation. Control exists when Precision has the power to govern the financial and operating policies of an entity so as to obtain benefits from its activities. In assessing control, potential voting rights that currently are exercisable are considered. The financial statements of subsidiaries are included in the consolidated financial statements from the date that control commences until the date that control ceases. Precision does not hold investments in any companies where it exerts significant influence and does not hold interests in any special-purpose entities. The acquisition method is used to account for acquisitions of subsidiaries and assets that meet the definition of a business under IFRS. The cost of an acquisition is measured as the fair value of the assets given, equity instruments issued, and liabilities incurred or assumed at the date of exchange. Identifiable assets acquired and liabilities and contingent liabilities assumed in a business combination are measured initially at their fair values at the acquisition date. The excess of the cost of acquisition over the fair value of the identifiable assets, liabilities and contingent liabilities acquired is recorded as goodwill. If the cost of acquisition is less than the fair value of the net assets of the subsidiary acquired, the difference is recognized immediately in the statement of earnings. Transaction costs, other than those associated with the issuance of debt or equity securities, that the Corporation incurs in connection with a business combination are expensed as incurred. (b) Cash and Cash Equivalents Cash and cash equivalents consist of cash and short-term investments with original maturities of three months or less. (c) Inventory Inventory is primarily comprised of operating supplies and carried at the lower of average cost, being the cost to acquire the inventory, and net realizable value. Inventory is charged to operating expenses as items are sold or consumed at the amount of the average cost of the item. (d) Property, Plant and Equipment Property, plant and equipment are carried at cost, less accumulated depreciation and any accumulated impairment losses. Cost includes an expenditure that is directly attributable to the acquisition of the asset. The cost of self-constructed assets includes the cost of materials and direct labour, any other costs directly attributable to bringing the assets to a working condition for their intended use, and borrowing costs on qualifying assets. The cost of replacing a part of an item of property, plant and equipment is recognized in the carrying amount of the item if it is probable that the future economic benefits embodied within the part will flow to the Corporation, and its cost can be measured reliably. The carrying amount of the replaced part is derecognized. The costs of the day-to-day servicing of property, plant and equipment (repair and maintenance) are recognized in profit or loss as incurred. Property, plant, and equipment are depreciated as follows: Expected Life Salvage Value Basis of Depreciation Drilling rig equipment: – Power & Tubulars 5 years – straight-line – Dynamic 10 years – straight-line – Structural 20 years 10% straight-line Service rig equipment 20 years 10% straight-line Drilling rig spare equipment up to 15 years – straight-line Service rig spare equipment up to 15 years – straight-line Rental equipment up to 15 years 0 to 25% straight-line Other equipment 3 to 10 years – straight-line Light duty vehicles 4 years – straight-line Heavy duty vehicles 7 to 10 years – straight-line Buildings 10 to 20 years – straight-line Property, plant and equipment are depreciated based on estimates of useful lives and salvage values. These estimates consider data and information from various sources including vendors, industry practice, and Precision’s own historical experience and may change as more experience is gained, market conditions shift, or technological advancements are made. Gains and losses on disposal of an item of property, plant and equipment are determined by comparing the proceeds from disposal to the carrying amount of property, plant and equipment, and are recognized in the consolidated statements of earnings (loss). Determination of which parts of the drilling rig equipment represent significant cost relative to the entire rig and identifying the consumption patterns along with the useful lives of these significant parts, are matters of judgment. This determination can be complex and subject to differing interpretations and views, particularly when rig equipment comprises individual components for which different depreciation methods or rates are appropriate. The estimated useful lives, residual values and method and components of depreciation are reviewed annually, and adjusted prospectively if appropriate. (e) Intangibles Intangible assets that are acquired by the Corporation with finite lives are initially recorded at estimated fair value and subsequently measured at cost less accumulated amortization and any accumulated impairment losses. Subsequent expenditures are capitalized only when they increase the future economic benefits of the specific asset to which they relate. Intangible assets are amortized based on estimates of useful lives. These estimates consider data and information from various sources including vendors and Precision’s own historical experience and may change as more experience is gained or technological advancements are made. Amortization is recognized in profit and loss using the straight-line method over the estimated useful lives of the respective assets. Precision’s loan commitment fees are amortized over the term of the respective facility. Software is amortized over its expected useful life of up to 10 years. The estimated useful lives and methods of amortization are reviewed annually and adjusted prospectively if appropriate. (f) Goodwill Goodwill is the amount that results when the purchase price of an acquired business exceeds the sum of the amounts allocated to the assets acquired, less liabilities assumed, based on their fair values. After initial recognition, goodwill is measured at cost less any accumulated impairment losses. For the purpose of impairment testing, goodwill acquired in a business combination is, from the acquisition date, attributed to the cash-generating unit ( CGU (g) Impairment of Non-Financial Assets The carrying amounts of the Corporation’s non-financial assets, other than inventories and deferred tax assets, are reviewed at each reporting date to determine whether there is any indication of impairment. For the purpose of impairment testing, assets are grouped together into the smallest group of assets that generates cash inflows from continuing use that are largely independent of the cash inflows of other assets or groups of assets (the cash-generating unit). Judgment is required in the aggregation of assets into CGUs. If any such indication exists, then the asset or CGU’s recoverable amount is estimated. Judgement is required when evaluating whether a CGU has indications of impairment. For CGUs that contain goodwill and other intangible assets that have indefinite lives or that are not yet available for use, an impairment test is, at a minimum, completed annually as of December 31. The recoverable amount of an asset or a CGU is the greater of its value in use and its fair value less costs to sell. In assessing value in use, the estimated future cash flows are discounted to their present value using an after-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset. Value in use is generally computed by reference to the present value of the future cash flows expected to be derived from the cash-generating unit. An impairment loss is recognized if the carrying amount of an asset or a CGU exceeds its estimated recoverable amount. Impairment losses are recognized in profit or loss. Impairment losses recognized in respect of CGUs are allocated first to reduce the carrying amount of any goodwill allocated to the CGU and then to reduce the carrying amounts of the other assets in the CGU on a pro rata basis. An impairment loss in respect of goodwill is not reversed. In respect of other assets, impairment losses recognized in prior years are assessed at each reporting date for any indications that the loss has decreased or no longer exists. An impairment loss is reversed only to the extent that the asset’s carrying amount does not exceed the carrying amount that would have been determined, net of depreciation or amortization, if no impairment loss had been recognized. (h) Borrowing Costs Interest and borrowing costs that are directly attributable to the acquisition, construction or production of assets that take a substantial period of time to prepare for their intended use are capitalized as part of the cost of those assets. Capitalization ceases during any extended period of suspension of construction or when substantially all activities necessary to prepare the asset for its intended use are complete. All other interest and borrowing costs are recognized in earnings in the period in which they are incurred. (i) Income Taxes Income tax expense is recognized in profit or loss except to the extent that it relates to items recognized directly in equity, in which case it is recognized in equity. Current tax is the expected tax payable or receivable on the taxable earnings or loss for the year, using tax rates enacted or substantively enacted at the reporting date, and any adjustment to tax payable in respect of previous years. Deferred tax is recognized using the asset and liability method, providing for temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for taxation purposes. Deferred tax is not recognized on the initial recognition of assets or liabilities in a transaction that is not a business combination. In addition, deferred tax is not recognized for taxable temporary differences arising on the initial recognition of goodwill. Deferred tax is measured at the tax rates that are expected to be applied to temporary differences when they reverse, based on the laws that have been enacted or substantively enacted at the reporting date. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in profit or loss in the period that includes the date of enactment or substantive enactment. Deferred tax assets and liabilities are offset if there is a legally enforceable right to offset and they relate to taxes levied by the same tax authority on the same taxable entity, or on different tax entities that are expected to settle current tax liabilities and assets on a net basis or their tax assets and liabilities will be realized simultaneously. A deferred tax asset is recognized to the extent that it is probable that future taxable profits will be available against which the temporary difference can be utilized. Deferred tax assets are reviewed at each reporting date and are reduced to the extent that it is no longer probable that the related tax benefit will be realized. The Corporation is subject to taxation in numerous jurisdictions. Uncertainties exist with respect to the interpretation of complex tax regulations and requires significant judgement. Differences arising between the actual results and the assumptions made, or future changes to such assumptions, could necessitate future adjustments to taxable income and expense already recorded. The Corporation establishes provisions, based on reasonable estimates, for possible consequences of audits by the tax authorities of the respective countries in which it operates. The amount of such provisions is based on various factors, such as experience of previous tax audits and differing interpretations of tax regulations by the taxable entity and the responsible tax authority. (j) Revenue from Contracts with Customers Precision recognizes revenue from a variety of sources. In general, customer invoices are issued upon rendering all performance obligations for an individual well-site job. Under the Corporation’s standard contract terms, customer payments are to be received within 30 days of the customer’s receipt of an invoice. Contract Drilling Services The Corporation contracts individual drilling rig packages, including crews and support equipment, to its customers. Depending on the customer’s drilling program, contracts may be for a single well, multiple wells or a fixed term. Revenue from contract drilling services is recognized over time from spud to rig release on a daily basis. Operating days are measured through industry standard tour sheets that document the daily activity of the rig. Revenue is recognized at the applicable day rate for each well, based on rates specified in the drilling contract. The Corporation provides services under turnkey contracts, whereby Precision is required to drill a well to an agreed upon depth under specified conditions for a fixed price, regardless of the time required or problems encountered in drilling the well. Revenue from turnkey drilling contracts is recognized over time using the input method based on costs incurred to date in relation to estimated total contract costs, as that most accurately depicts the Corporation’s performance. The Corporation also provides directional drilling services, which include the provision of directional drilling equipment, tools and personnel to the wellsite, and performance of daily directional drilling services. Directional drilling revenue is recognized over time, upon the daily completion of operating activities. Operating days are measured through daily tour sheets. Revenue is recognized at the applicable day rate, as stipulated in the directional drilling contract. Completion and Production Services The Corporation provides a variety of well completion and production services including well servicing and snubbing. In general, service rigs do not involve long-term contracts or penalties for termination. Revenue is recognized daily upon completion of services. Operating days are measured through daily tour sheets and field tickets. Revenue is recognized at the applicable daily or hourly rate, as stipulated in the contract. The Corporation offers a variety of oilfield equipment for rental to its customers. Rental revenue is recognized daily at the applicable rate stated in the rental contract. Rental days are measured through field tickets. The Corporation provides accommodation and catering services to customers in remote locations. Customers contract these services either as a package or individually for a fixed term. For accommodation services, the Corporation supplies camp equipment and revenue is recognized over time on a daily basis, once the equipment is on-site and available for use, at the applicable rate stated in the contract. For catering services, the Corporation recognizes revenue daily according to meals served. Accommodation and catering services provided are measured through field tickets. (k) Employee Benefit Plans Precision sponsors various defined contribution retirement plans for its employees. The Corporation’s contributions to defined contribution plans are expensed as employees earn the entitlement. (l) Provisions Provisions are recognized when the Corporation has a present obligation as a result of a past event, when it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation, and when a reliable estimate can be made of the amount of the obligation. The amount recognized as a provision is the best estimate of the consideration required to settle the present obligation at the end of the reporting period, taking into account the risks and uncertainties surrounding the obligation. Where a provision is measured using the cash flows estimated to settle the present obligation, its carrying amount is the present value of those cash flows. (m) Share Based Incentive Compensation Plans The Corporation has established several cash-settled share based incentive compensation plans for non-management directors, officers, and other eligible employees. The estimated fair value of amounts payable to eligible participants under these plans are recognized as an expense with a corresponding increase in liabilities over the period that the participants become unconditionally entitled to payment. The recorded liability is re-measured at the end of each reporting period until settlement with the resultant change to the fair value of the liability recognized in profit or loss for the period. When the plans are settled, the cash paid reduces the outstanding liability. The Corporation has an employee share purchase plan that allows eligible employees to purchase common shares through payroll deductions. Under this plan, contributions made by employees are matched to a specific percentage by the Corporation. The contributions made by the Corporation are expensed as incurred. Prior to January 1, 2012, the Corporation had an equity-settled deferred share unit plan whereby non-management directors of Precision could elect to receive all or a portion of their compensation in fully-vested deferred share units. Compensation expense was recognized based on the fair value price of the Corporation’s shares at the date of grant with a corresponding increase to contributed surplus. Upon redemption of the deferred share units into common shares, the amount previously recognized in contributed surplus is recorded as an increase to shareholders’ capital. The Corporation continues to have obligations under this plan. The Corporation has a share option plan for certain eligible employees. Under this plan, the fair value of share purchase options is calculated at the date of grant using the Black-Scholes option pricing model, and that value is recorded as compensation expense over the grant’s vesting period with an offsetting credit to contributed surplus. A forfeiture rate is estimated on the grant date and is adjusted to reflect the actual number of options that vest. Upon exercise of the equity purchase option, the associated amount is reclassified from contributed surplus to shareholders’ capital. Consideration paid by employees upon exercise of the equity purchase options is credited to shareholders’ capital. (n) Foreign Currency Translation Transactions of the Corporation’s individual entities are recorded in the currency of the primary economic environment in which it operates (its functional currency). Transactions in currencies other than the entities’ functional currency are translated at rates in effect at the time of the transaction. At each period end, monetary assets and liabilities are translated at the prevailing period-end rates. Non-monetary items that are measured in terms of historical cost in a foreign currency are not retranslated. Gains and losses are included in profit or loss except for gains and losses on translation of long-term debt designated as a hedge of foreign operations, which are deferred and included in other comprehensive income. For the purpose of preparing the Corporation’s consolidated financial statements, the financial statements of each foreign operation that does not have a Canadian dollar functional currency are translated into Canadian dollars. Assets and liabilities are translated at exchange rates in effect at the period end date. Revenues and expenses are translated using average exchange rates for the month of the respective transaction. Gains or losses resulting from these translation adjustments are recognized initially in other comprehensive income and reclassified from equity to profit or loss on disposal or partial disposal of the foreign operation. (o) Per Share Amounts Basic per share amounts are calculated using the weighted average number of shares outstanding during the period. Diluted per share amounts are calculated by using the treasury stock method for equity-based compensation arrangements. The treasury stock method assumes that any proceeds obtained on exercise of equity-based compensation arrangements would be used to purchase common shares at the average market price during the period. The weighted average number of shares outstanding is then adjusted by the difference between the number of shares issued from the exercise of equity-based compensation arrangements and shares repurchased from the related proceeds. (p) Financial Instruments i) Non-Derivative Financial Instruments: Financial assets and liabilities are classified and measured at amortized cost, fair value through other comprehensive income or fair value through profit and loss. The classification of financial assets and liabilities is generally based on the business model in which the asset or liability is managed and its contractual cash flow characteristics. Financial assets held within a business model whose objective is to collect contractual cash flows and whose contractual terms give rise to cash flows on specified dates that are solely payments of principal and interest on the principal amount outstanding are measured at amortized cost. After their initial fair value measurement, accounts receivable, accounts payable and accrued liabilities and long-term debt are classified and measured at amortized cost using the effective interest rate method. Upon initial recognition of a non-derivative financial asset a loss allowance is recorded for expected credit losses (ECL). Loss allowances for trade receivables are measured based on lifetime ECL that incorporates historical loss information and is adjusted for current economic and credit conditions. ii) Derivative Financial Instruments: The Corporation may enter into certain financial derivative contracts in order to manage the exposure to market risks from fluctuations in interest rates or exchange rates. These instruments are not used for trading or speculative purposes. Precision has not designated its financial derivative contracts as effective accounting hedges, and thus has not applied hedge accounting, even though it considers certain financial contracts to be economic hedges. As a result, financial derivative contracts are classified as fair value through profit or loss and are recorded on the statement of financial position at estimated fair value. Transaction costs are recognized in profit or loss when incurred. Derivatives embedded in financial assets are never separated. Rather, the financial instrument as a whole is assessed for classification. Derivatives embedded in financial liabilities are separated from the host contract and accounted for separately when their economic characteristics and risks are not closely related to the host contract. Embedded derivatives in financial liabilities are recorded on the statement of financial position at estimated fair value and changes in the fair value are recognized in earnings. (q) Hedge Accounting The Corporation utilizes foreign currency long-term debt to hedge its exposure to changes in the carrying values of the Corporation’s net investment in certain foreign operations from fluctuations in foreign exchange rates. To be accounted for as a hedge, the foreign currency long-term debt must be designated and documented as a hedge and must be effective at inception and on an ongoing basis. The documentation defines the relationship between the foreign currency long-term debt and the net investment in the foreign operations, as well as the Corporation’s risk management objective and strategy for undertaking the hedging transaction. The Corporation formally assesses, both at inception and on an ongoing basis, whether the changes in fair value of the foreign currency long-term debt is highly effective in offsetting changes in fair value of the net investment in the foreign operations. The portion of gains or losses on the hedging item determined to be an effective hedge is recognized in other comprehensive income, net of tax, and is limited to the translation gain or loss on the net investment, while ineffective portions are recorded through profit or loss. A reduction in the fair value of the net investment in the foreign operations or increase in the foreign currency long-term debt balance may result in a portion of the hedge becoming ineffective. If the hedging relationship ceases to be effective or is terminated, hedge accounting is not applied to subsequent gains or losses. The amounts recognized in other comprehensive income are reclassified to profit and loss and the corresponding exchange gains or losses arising from the translation of the foreign operation are recorded through profit and loss upon dissolution or substantial dissolution of the foreign operation. (r) Assets Held For Sale Non-current assets, or disposal groups, are classified as held-for sale if it is highly probable that their carrying amount will be recovered primarily through a sale transaction rather than through continued use. Such assets, or disposal groups, are measured at the lower of their carrying amount and fair value less costs to sell. Impairment losses on initial classification as held-for-sale and subsequent gains or losses on remeasurement are recognized in profit or loss. (s) Leases At inception, Precision assesses whether its contracts contain a lease. A contract contains a lease if it conveys the right to control the use of an identified asset for a period of time in exchange for consideration. The assessment of whether a contract conveys the right to control the use of an identified asset considers whether: • the contract involves the use of an identified asset and the substantive substitution rights of the supplier. If the supplier has a substantive substitution right, then the asset is not identified; • the lessee’s right to obtain substantially all of the economic benefits from the use of the asset; and • the lessee’s right to direct the use of the asset, including decision-making to change how and for what purpose the asset is used. At inception or on reassessment of a contract that contains a lease component, Precision allocates the consideration in the contract to each lease component on the basis of their relative stand-alone prices. Leases in which Precision is a lessee Precision recognizes a right of use asset and corresponding lease obligation at the lease commencement date. The right of use asset is initially measured at cost, which comprises the initial amount of the lease obligation adjusted for lease payments made on or before commencement date, incurred initial direct costs, estimated site retirement costs and any lease incentives received. The right of use asset is subsequently depreciated using the straight-line method from the commencement date to the earlier of the end of the useful life of the right of use asset or the end of the lease term. The estimated useful lives of right of use assets are consistent with those of property, plant and equipment. In addition, the right of use asset is reduced by impairment losses, if any, and adjusted for certain remeasurements of the lease obligation. The lease obligation is initially measured at the present value of the minimum lease payments not paid at commencement date, discounted using the interest rate implicit in the lease or, if that rate cannot be readily determined, Precision’s incremental borrowing rate. Generally, Precision uses its incremental borrowing rate as the discount rate for those leases in which it is the lessee. Lease payments included in the measurement of the lease obligation comprise the following: • fixed payments, including in-substance fixed payments; • variable lease payments that depend on an index or a rate, initially measured using the index or rate as at the commencement date; • amounts expected to be payable under a residual value guarantee; and • the exercise price under a purchase option that Precision is reasonably certain to exercise, lease payments in an optional renewal period if Precision is reasonably certain to exercise an extension option, and penalties for early termination of a lease unless Precision is reasonably certain not to terminate early. The lease obligation is measured at amortized cost using the effective interest method. The measurement of lease obligations require the use of certain estimates and assumptions including discount rates, exercise of lease term extension options, and escalating lease rates. It is remeasured when there is a change in: • future lease payments arising from a change in an index or rate; • the estimated amount expected to be payable under a residual value guarantee; or • the assessment of whether Precision will exercise a purchase, extension or termination option. When the lease obligation is remeasured in this way, a corresponding adjustment is made to the carrying amount of the right of use asset, or is recorded in profit or loss if the carrying amount of the right of use asset has been reduced to zero. Leases in which Precision is a lessor When Precision acts as a lessor, at inception, Precision evaluates the classification as either a finance or operating lease. To classify each lease, Precision makes an overall assessment of whether the lease transfers substantially all of the risks and rewards incidental to ownership of the underlying asset. If this is the case, then the lease is a finance lease; if not, then it is an operating lease. When acting as a sub-lessor, Precision accounts for its interests in the head lease and the sub-lease separately. It assesses the lease classification of a sub-lease with reference to the right of use asset arising from the head lease, not with reference to the underlying asset. If a head lease is a short-term lease then Precision classifies the sub-lease as an operating lease. If an arrangement contains lease and non-lease components, Precision applies IFRS 15 to allocate the consideration in the contract. Precision recognizes lease payments received under operating leases for drilling rigs as income on a systematic basis, drilling days, over the lease term as part of revenue. The accounting policies applicable to Precision as a lessor in the comparative period were not different from IFRS 16. However, when Precision was an intermediate lessor the sub-leases were classified with reference to the underlying asset. (t) Critical Accounting Assumptions and Estimates i) Impairment of Long-Lived Assets At each reporting date, the Corporation reviews the carrying amount of assets in each CGU to determine whether an indicator of impairment exists. The Corporation’s analysis is based on relevant internal and external factors that indicate a CGU may be impaired such as the obsolescence or planned disposal of significant assets, financial performance of the CGU compared to forecasts and consideration of the Corporation’s market capitalization. When indications of impairment exist within a CGU, a recoverable amount is determined and requires assumptions to estimate future discounted cash flows. These estimates and assumptions include future drilling activity, margins and market conditions over the long-term life of the CGU. In selecting a discount rate, the Corporation uses observable market data inputs to develop a rate that the Corporation believes approximates the discount rate of market participants. Although the Corporation believes the assumptions and estimates are reasonable and consistent with current conditions, internal planning, and expected future operations, such assumptions and estimations are subject to significant uncertainty and judgment. ii) Income Taxes Significant estimation and assumptions are required in determining the provision for income taxes. The recognition of deferred tax assets in respect of deductible temporary differences and unused tax losses and credits is based on the Corporation’s estimation of future taxable profit against which these differences, losses and credits may be used. The assessment is based upon existing tax law

Revenue

Revenue	12 Months Ended
	Dec. 31, 2019
Disclosure Of Revenue Explanatory [Abstract]
Revenue	NOTE 4. REVENUE The following table includes a reconciliation of disaggregated revenue by reportable segment (Note 5). Revenue has been disaggregated by primary geographical market and type of service provided. Twelve months ended December 31, 2019 Contract Drilling Services Completion and Production Services Corporate and Other Inter- Segment Eliminations Total Canada $ 336,483 $ 128,202 $ — $ (5,308 ) $ 459,377 United States 852,293 19,627 — (269 ) 871,651 International 210,292 — — — 210,292 $ 1,399,068 $ 147,829 $ — $ (5,577 ) $ 1,541,320 Day rate/hourly services $ 1,333,114 $ 147,829 $ — $ (905 ) $ 1,480,038 Shortfall payments/idle but contracted 9,789 — — — 9,789 Turnkey drilling services 3,754 — — — 3,754 Directional services 41,876 — — — 41,876 Other 10,535 — — (4,672 ) 5,863 $ 1,399,068 $ 147,829 $ — $ (5,577 ) $ 1,541,320 Twelve months ended December 31, 2018 Contract Drilling Services Completion and Production Services Corporate and Other Inter- Segment Eliminations Total Canada $ 426,475 $ 138,030 $ — $ (5,759 ) $ 558,746 United States 778,886 12,730 — (304 ) 791,312 International 191,131 — — — 191,131 $ 1,396,492 $ 150,760 $ — $ (6,063 ) $ 1,541,189 Day rate/hourly services $ 1,302,575 $ 150,760 $ — $ (1,009 ) $ 1,452,326 Shortfall payments/idle but contracted 12,520 — — — 12,520 Turnkey drilling services 37,811 — — — 37,811 Directional services 31,943 — — — 31,943 Other 11,643 — — (5,054 ) 6,589 $ 1,396,492 $ 150,760 $ — $ (6,063 ) $ 1,541,189

Segmented Information

Segmented Information	12 Months Ended
	Dec. 31, 2019
Disclosure Of Operating Segments [Abstract]
Segmented Information	NOTE 5. SEGMENTED INFORMATION The Corporation operates primarily in Canada, the United States and certain international locations, in two industry segments; Contract Drilling Services and Completion and Production Services. Contract Drilling Services includes drilling rigs, directional drilling, procurement and distribution of oilfield supplies, and the manufacture, sale and repair of drilling equipment. Completion and Production Services includes service rigs, oilfield equipment rental, and camp and catering services. 2019 Contract Drilling Services Completion and Production Services Corporate and Other Inter- Segment Eliminations Total Revenue $ 1,399,068 $ 147,829 $ — $ (5,577 ) $ 1,541,320 Operating earnings (loss) 160,997 10,041 (76,461 ) — 94,577 Depreciation and amortization 300,882 17,881 14,853 — 333,616 Gain on asset disposals (46,849 ) (3,767 ) (125 ) — (50,741 ) Loss on asset decommissioning 20,263 — — — 20,263 Reversal of impairment of property, plant and equipment (5,810 ) — — — (5,810 ) Total assets 2,963,260 152,611 153,969 — 3,269,840 Capital expenditures 154,066 5,448 1,180 — 160,694 2018 Contract Drilling Services Completion and Production Services Corporate and Other Inter- Segment Eliminations Total Revenue $ 1,396,492 $ 150,760 $ — $ (6,063 ) $ 1,541,189 Operating loss (129,965 ) (8,998 ) (59,110 ) — (198,073 ) Depreciation and amortization 341,712 22,801 12,531 — 377,044 Loss (gain) on asset disposals (7,157 ) 1,078 (5,305 ) — (11,384 ) Impairment of goodwill 207,544 — — — 207,544 Total assets 3,301,457 170,113 164,473 — 3,636,043 Capital expenditures 108,610 5,004 12,529 — 126,143 A reconciliation of operating earnings (loss) to loss before income taxes is as follows: 2019 2018 Operating earnings (loss) $ 94,577 $ (198,073 ) Add (deduct): Foreign exchange (8,722 ) 4,017 Finance charges 118,453 127,178 Gain on redemption and repurchase of unsecured senior notes (6,815 ) (5,672 ) Loss before income taxes $ (8,339 ) $ (323,596 ) The Corporation’s operations are carried on in the following geographic locations: 2019 United States Canada International Total Revenue $ 871,651 $ 459,377 $ 210,292 $ 1,541,320 Total assets 1,560,523 1,133,591 575,726 3,269,840 2018 United States Canada International Total Revenue $ 791,312 $ 558,746 $ 191,131 $ 1,541,189 Total assets 1,772,850 1,269,542 593,651 3,636,043

Assets Held for Sale

Assets Held for Sale	12 Months Ended
	Dec. 31, 2019
Noncurrent Assets Or Disposal Groups Classified As Held For Sale Or As Held For Distribution To Owners [Abstract]
Assets Held for Sale	NOTE 6. ASSETS HELD FOR SALE In December 2018, Precision commenced a process to sell drilling rigs that no longer met the Corporation’s High Performance technology standards. The disposal group, contained within its Contract Drilling Services segment, was classified as held for sale and measured at the lower of its carrying value and fair value less costs to sell. At December 31, 2018, the disposal group was stated at its carrying value of $20 million, which was less than its estimated fair value. In 2019, Precision’s efforts to sell the disposal group were unsuccessful and the drilling rigs were decommissioned.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2019
Disclosure Of Property Plant And Equipment [Abstract]
Property, Plant and Equipment	NOTE 7. PROPERTY, PLANT AND EQUIPMENT 2019 2018 Cost $ 6,670,979 $ 6,937,062 Accumulated depreciation (3,921,516 ) (3,898,450 ) $ 2,749,463 $ 3,038,612 Rig equipment 2,510,505 2,745,172 Rental equipment 34,437 43,992 Other equipment 38,604 52,195 Vehicles 7,796 12,702 Buildings 56,834 65,561 Assets under construction 67,740 84,561 Land 33,547 34,429 $ 2,749,463 $ 3,038,612 Cost Rig Equipment Rental Equipment Other Equipment Vehicles Buildings Assets Under Construction Land Total Balance, December 31, 2017 $ 6,034,166 $ 148,011 $ 244,950 $ 43,201 $ 127,385 $ 102,035 $ 33,886 $ 6,733,634 Additions 7,013 — 347 — 569 106,647 — 114,576 Disposals (32,153 ) (18,227 ) (59,865 ) (228 ) (3,663 ) — (893 ) (115,029 ) Reclassifications 127,668 — 507 — — (128,175 ) — — Reclassification to assets held for sale (135,398 ) — — — — — — (135,398 ) Effect of foreign currency exchange differences 321,240 679 5,351 2,483 4,036 4,054 1,436 339,279 Balance, December 31, 2018 6,322,536 130,463 191,290 45,456 128,327 84,561 34,429 6,937,062 Additions 18,436 — 976 224 415 139,835 — 159,886 Disposals (69,945 ) (19,982 ) (4,708 ) (6,014 ) (58 ) — — (100,707 ) Reclassifications 150,674 — 1,197 — — (151,871 ) — — Asset decommissioning (4,364 ) — — — — — — (4,364 ) Effect of foreign currency exchange differences (307,954 ) (174 ) (3,436 ) (1,160 ) (2,507 ) (4,785 ) (882 ) (320,898 ) Balance, December 31, 2019 $ 6,109,383 $ 110,307 $ 185,319 $ 38,506 $ 126,177 $ 67,740 $ 33,547 $ 6,670,979 Accumulated Depreciation Rig Equipment Rental Equipment Other Equipment Vehicles Buildings Assets Under Construction Land Total Balance, December 31, 2017 $ 3,210,384 $ 87,832 $ 178,390 $ 26,921 $ 56,283 $ — $ — $ 3,559,810 Depreciation expense 335,215 9,418 15,993 4,820 8,126 — — 373,572 Disposals (28,399 ) (11,249 ) (59,857 ) (220 ) (3,161 ) — — (102,886 ) Reclassification to assets held for sale (115,740 ) — — — — — — (115,740 ) Effect of foreign currency exchange differences 175,904 470 4,569 1,233 1,518 — — 183,694 Balance, December 31, 2018 3,577,364 86,471 139,095 32,754 62,766 — — 3,898,450 Depreciation expense 289,056 7,473 13,023 3,521 7,663 — — 320,736 Disposals (33,929 ) (17,933 ) (3,274 ) (4,768 ) (58 ) — — (59,962 ) Asset decommissioning (3,518 ) — — — — — — (3,518 ) Reversal of impairment of property, plant and equipment (5,810 ) — — — — — — (5,810 ) Effect of foreign currency exchange differences (224,285 ) (141 ) (2,129 ) (797 ) (1,028 ) — — (228,380 ) Balance, December 31, 2019 $ 3,598,878 $ 75,870 $ 146,715 $ 30,710 $ 69,343 $ — $ — $ 3,921,516 (a) Asset Disposals In addition to those items below, through the completion of normal course business operations, the Corporation sold used assets incurring gains or losses on disposal. Mexico In the second quarter of 2019, Precision concluded the sale of its Mexico-based drilling rigs and ancillary equipment, contained within its Contract Drilling Services segment, for total proceeds of US$48 million. Precision recognized a gain on asset disposal of US$24 million and reversed US$4 million of previous impairment charges. Snubbing In the second quarter of 2019, Precision disposed of certain snubbing units and related equipment, contained within the Completion and Production Services segment, for proceeds of $8 million resulting in a gain on asset disposal of $3 million. (b) Impairment Test Precision reviews the carrying value of its long-lived assets at each reporting period for indications of impairment. The Corporation did not identify an indication of impairment within the Corporation’s CGUs as at December 31, 2019. Accordingly, no impairment tests were performed. For the year ended December 31, 2018, impairment charges of $208 million were recorded against goodwill. Refer to Note 9 for discussion of impairment tests performed. (c) Decommissioned Drilling Rigs In 2019, the Corporation incurred a $20 million (2018 – nil) loss on the decommissioning of certain drilling and ancillary equipment, contained within the Contract Drilling Services segment, that no longer met the Corporation’s High Performance technology standards. The decommissioning charge included those drilling rigs that were previously held for sale. (d) Change in Rig Components In the fourth quarter of 2019, Precision performed its annual review of estimated useful lives, residual values and methods and components of depreciation of property, plant and equipment. Due to changes in the timing, nature and complexity of certain rig recertifications, the Corporation determined the associated costs represent a separate component of property, plant and equipment. This change has been recognized prospectively and is expected to increase the Corporation’s 2020 depreciation expense by approximately $3 million.

Intangibles

Intangibles	12 Months Ended
	Dec. 31, 2019
Disclosure Of Intangible Assets [Abstract]
Intangibles	NOTE 8. INTANGIBLES 2019 2018 Cost $ 53,416 $ 51,912 Accumulated amortization (21,670 ) (16,511 ) $ 31,746 $ 35,401 Loan commitment fees related to Senior Credit Facility $ 2,272 $ 2,307 Software 29,474 33,094 $ 31,746 $ 35,401 Cost Loan Commitment Fees Software Total Balance, December 31, 2017 $ 14,138 $ 25,569 $ 39,707 Additions 638 11,567 12,205 Balance, December 31, 2018 14,776 37,136 51,912 Additions 702 808 1,510 Effect of foreign currency exchange differences — (6 ) (6 ) Balance, December 31, 2019 $ 15,478 $ 37,938 $ 53,416 Accumulated Amortization Loan Commitment Fees Software Total Balance, December 31, 2017 $ 11,018 $ 573 $ 11,591 Amortization expense 1,451 3,469 4,920 Balance, December 31, 2018 12,469 4,042 16,511 Amortization expense 737 4,422 5,159 Balance, December 31, 2019 $ 13,206 $ 8,464 $ 21,670

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2019
Disclosure Of Goodwill [Abstract]
Goodwill	NOTE 9. GOODWILL Balance, December 31, 2017 $ 205,167 Impairment charge (207,544 ) Exchange adjustment 2,377 Balance, December 31, 2018 and 2019 $ — In 2018, Precision performed its annual impairment test for those CGUs containing goodwill and determined the goodwill associated with the Canadian Contract Drilling and U.S. Directional Drilling CGUs were not recoverable. Accordingly, an impairment charge of $208 million was recorded in the statement of net earnings (loss) for the period ended December 31, 2018. Both CGUs were contained within the Contract Drilling Services segment. In performing the 2018 goodwill impairment tests, the Corporation used a value in use approach. Projected cash flows covered a five-year period and were based on future expected outcomes taking into account existing term contracts, past experience and management’s expectation of future market conditions. The primary source of cash flow information was the strategic plan approved by the Corporation’s Board of Directors. These strategic plans were developed based on benchmark commodity prices and industry supply-demand fundamentals. Canadian Contract Drilling Cash flows used in the impairment calculation were discounted using a discount rate specific to the Canadian Contract Drilling CGU. The after-tax discount rate derived from Precision’s weighted average cost of capital, adjusted for risk factors specific to the CGU and used in determining the recoverable amount for the Canadian Contract Drilling CGU was 11.66%. The test resulted in a goodwill impairment charge of $172 million as the carrying value of the CGU’s assets exceeded its value in use of $942 million. The key assumptions used in the calculation of the CGU’s value in use included the discount rate and a terminal value growth rate of nil. An increase of 0.5% to the discount rate would result in approximately $37 million of additional impairment charges to the remaining assets within the CGU. US Directional Drilling Cash flows used in the impairment calculation were discounted using a discount rate specific to the U.S. Directional Drilling CGU. The after-tax discount rate derived from Precision’s weighted average cost of capital, adjusted for risk factors specific to the CGU and used in determining the recoverable amount for the U.S. Directional Drilling CGU was 12.16%. The test resulted in a goodwill impairment charge of $35 million as the carrying value of the CGU’s assets exceeded its value in use of $39 million. The key assumptions used in the calculation of the CGU’s value in use included the discount rate and a terminal value growth rate of nil. An increase of 0.5% to the discount rate would result in approximately $2 million of additional impairment charges to the remaining assets within the CGU.

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2019
Disclosure Of Long Term Debt [Abstract]
Long-Term Debt	NOTE 10. LONG-TERM DEBT 2019 2018 2019 2018 Senior Credit Facility US $ — US $ — $ — $ — Unsecured Senior Notes: 6.5% senior notes due 2021 90,625 165,625 117,678 226,113 7.75% senior notes due 2023 344,845 350,000 447,792 477,823 5.25% senior notes due 2024 307,690 351,104 399,545 479,331 7.125% senior notes due 2026 369,735 400,000 480,112 546,084 US $ 1,112,895 US $ 1,266,729 1,445,127 1,729,351 Less net unamortized debt issue costs (17,946 ) (23,098 ) $ 1,427,181 $ 1,706,253 Senior Credit Facility Unsecured Senior Notes Debt Issue Costs Total Balance December 31, 2017 $ — $ 1,758,519 $ (28,082 ) $ 1,730,437 Changes from financing cash flows: Redemption / repurchase of senior notes — (168,722 ) — (168,722 ) Non-cash changes: Gain on redemption / repurchase of unsecured senior notes — (5,672 ) — (5,672 ) Amortization of debt issue costs — — 4,984 4,984 Foreign exchange adjustment — 145,226 — 145,226 Balance December 31, 2018 — 1,729,351 (23,098 ) 1,706,253 Changes from financing cash flows: Redemption / repurchase of senior notes — (198,387 ) — (198,387 ) Non-cash changes: Gain on redemption / repurchase of unsecured senior notes — (6,815 ) — (6,815 ) Amortization of debt issue costs — — 5,152 5,152 Foreign exchange adjustment — (79,022 ) — (79,022 ) Balance December 31, 2019 $ — $ 1,445,127 $ (17,946 ) $ 1,427,181 Long-term debt obligations at December 31, 2019 will mature as follows: 2020 $ — 2021 117,678 2022 — 2023 447,792 Thereafter 879,657 $ 1,445,127 (a) Senior Credit Facility: The senior secured revolving credit facility (Senior Credit Facility) provides Precision with senior secured financing for general corporate purposes, including for acquisitions, of up to US$500 million with a provision for an increase in the facility of up to an additional US$300 million. The Senior Credit Facility is secured by charges on substantially all of the present and future assets of Precision, its material U.S. and Canadian subsidiaries and, if necessary, to adhere to covenants under the Senior Credit Facility, certain subsidiaries organized in jurisdictions outside of Canada and the U.S. The Senior Credit Facility requires that Precision comply with certain restrictive and financial covenants including a leverage ratio of consolidated senior debt to consolidated Covenant EBITDA (as defined in the debt agreement) of less than 2.5:1. For purposes of calculating the leverage ratio consolidated senior debt only includes secured indebtedness. It also requires the Corporation to maintain a ratio of consolidated Covenant EBITDA to consolidated interest expense for the most recent four consecutive quarters, of greater than 2.5:1. Distributions under the Senior Credit Facility are subject to a pro-forma senior net leverage covenant of less than or equal to 1.75:1. The Senior Credit Facility also limits the redemption and repurchase of junior debt subject to a pro-forma senior net leverage covenant test of less than or equal to 1.75:1. The Senior Credit Facility has a term of four years, with an annual option on Precision’s part to request that the lenders extend, at their discretion, the facility to a new maturity date not to exceed five years from the date of the extension request. The current maturity date of the Senior Credit Facility is November 21, 2023. Under the Senior Credit Facility, amounts can be drawn in U.S. dollars and/or Canadian dollars. At December 31, 2019, no amounts were drawn under this facility (2018 – nil). Up to US$200 million of the Senior Credit Facility is available for letters of credit denominated in U.S and/or Canadian dollars and other currencies acceptable to the fronting lender. As at December 31, 2019 outstanding letters of credit amounted to US$25 million (2018 – US$28 million). The interest rate on loans that are denominated in U.S. dollars is, at the option of Precision, either a margin over a U.S. base rate or a margin over LIBOR. The interest rate on loans denominated in Canadian dollars is, at the option of Precision, either a margin over the Canadian prime rate or a margin over the Canadian Dollar Offered Rate ( CDOR (b) Unsecured Senior Notes: Precision has outstanding the following unsecured senior notes: 6.5% US$ senior notes due 2021 These notes bear interest at a fixed rate of 6.5% per annum and mature on December 15, 2021. Interest is payable semi-annually on June 15 and December 15 of each year. Precision may redeem these notes in whole or in part after December 15, 2019 for their principal amount plus accrued interest. Upon specified change of control events, each holder of a note will have the right to sell to Precision all or a portion of its notes at a purchase price in cash equal to 101% of the principal amount, plus accrued interest to the date of purchase. During 2019, Precision redeemed US$75 million principal amount of these notes for an aggregate purchase price of US$76 million. The difference was recognized as a loss on redemption of unsecured senior notes within the consolidated statement of earnings (loss). Subsequent to December 31, 2019, Precision redeemed US$25 million principal amount of these notes for an aggregate purchase price of US$25 million. 7.75% US$ senior notes due 2023 These notes bear interest at a fixed rate of 7.75% per annum and mature on December 15, 2023. Interest is payable semi-annually on June 15 and December 15 of each year. Precision may redeem these notes in whole or in part at any time on or after December 15, 2019 and before December 15, 2021, at redemption prices ranging between 103.875% and 101.938% of their principal amount plus accrued interest. Any time on or after December 15, 2021, these notes can be redeemed for their principal amount plus accrued interest. Upon specified change of control events, each holder of a note will have the right to sell to Precision all or a portion of its notes at a purchase price in cash equal to 101% of the principal amount, plus accrued interest to the date of purchase. During 2019, Precision repurchased and cancelled US$5 million of these notes for an aggregate purchase price of US$5 million. The difference was recognized as a gain on redemption of unsecured senior notes within the consolidated statement of earnings (loss). 5.25% US$ senior notes due 2024 These notes bear interest at a fixed rate of 5.25% per annum and mature on November 15, 2024. Interest is payable semi-annually on May 15 and November 15 of each year. Precision may redeem these notes in whole or in part at any time on or after May 15, 2019 and before May 15, 2022, at redemption prices ranging between 102.625% and 100.875% of their principal amount plus accrued interest. Any time on or after May 15, 2022, these notes can be redeemed for their principal amount plus accrued interest. Upon specified change of control events, each holder of a note will have the right to sell to Precision all or a portion of its notes at a purchase price in cash equal to 101% of the principal amount, plus accrued interest to the date of purchase. During 2019, Precision repurchased and cancelled US$43 million of these notes for an aggregate purchase price of US$39 million. The difference was recognized as a gain on repurchase of unsecured senior notes within the consolidated statement of earnings (loss). Subsequent to December 31, 2019, Precision repurchased and cancelled US$5 million of these notes for an aggregate purchase price of US$4 million. 7.125% US$ senior notes due 2026 These notes bear interest at a fixed rate of 7.125% per annum and mature on January 15, 2026. Interest is payable semi-annually on January 15 and July 15 of each year, commencing July 15, 2018. Prior to November 15, 2020, Precision may redeem up to 35% of the 7.125% senior notes due 2026 with the net proceeds of certain equity offerings at a redemption price equal to 107.125% of the principal amount plus accrued interest. Prior to November 15, 2020, Precision may redeem these notes in whole or in part at 100.0% of their principal amount, plus accrued interest and the greater of 1.0% of the principal amount of the note to be redeemed and the excess, if any, of the present value of the November 15, 2020 redemption price plus required interest payments through November 15, 2020 (calculated using the U.S. Treasury rate plus 50 basis points) over the principal amount of the note. As well, Precision may redeem these notes in whole or in part at any time on or after November 15, 2020 and before November 15, 2022, at redemption prices ranging between 105.344% and 101.781% of their principal amount plus accrued interest. Any time on or after November 15, 2023, these notes can be redeemed for their principal amount plus accrued interest. Upon specified change of control events, each holder of a note will have the right to sell to Precision all or a portion of its notes at a purchase price in cash equal to 101% of the principal amount, plus accrued interest to the date of purchase. During 2019, Precision repurchased and cancelled US$30 million of these notes for an aggregate purchase price of US$29 million. The difference was recognized as a gain on repurchase of unsecured senior notes within the consolidated statement of earnings (loss). Subsequent to December 31, 2019, Precision repurchased and cancelled US$2 million of these notes for an aggregate purchase price of US$2 million. The unsecured senior notes require Precision to comply with certain restrictive and financial covenants including an incurrence based test of Consolidated Interest Coverage Ratio, as defined in the senior note agreements, of greater than or equal to 2.0:1 for the most recent four consecutive fiscal quarters. In the event that the Consolidated Interest Coverage Ratio is less than 2.0:1 for the most recent four consecutive fiscal quarters the senior notes restrict our ability to incur additional indebtedness. The unsecured senior notes also contain a restricted payments covenant that limits Precision’s ability to make payments in the nature of dividends, distributions and for repurchases from shareholders. This restricted payment basket grows by, among other things, 50% of cumulative consolidated net earnings, and decreases by 100% of cumulative consolidated net losses as defined in the note agreements, and cumulative payments made to shareholders. As at December 31, 2019, the governing net restricted payments basket was negative $517 million (2018 – negative $496 million), therefore limiting us from making any further dividend payments or share repurchases until the governing restricted payments basket once again becomes positive. Precision’s unsecured senior notes are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by all U.S. and Canadian subsidiaries that guaranteed the Senior Credit Facility ( Guarantor Subsidiaries (c) Covenants: Following is a listing of the currently applicable restrictive and financial covenants as at December 31, 2019: Covenant At December 31, 2019 Senior Credit Facility Consolidated senior debt to consolidated covenant EBITDA (1) ≤ 2.50 0.00 Consolidated covenant EBITDA to consolidated interest expense ≥ 2.50 3.39 Unsecured Senior Notes Consolidated interest coverage ratio ≥ 2.00 3.30 (1) For purposes of calculating the leverage ratio consolidated senior debt only includes secured indebtedness. At December 31, 2019, Precision was in compliance with the covenants of the Senior Credit Facility and unsecured senior notes.

Restructuring and Other Recover

Restructuring and Other Recoveries	12 Months Ended
	Dec. 31, 2019
Disclosure Of Restructuring And Other Recoveries [Abstract]
Restructuring and Other Recoveries	NOTE 11. RESTRUCTURING AND OTHER RECOVERIES For the period ended December 31, 2019, the Corporation had restructuring charges of $6 million (2018 - $1 million) and other recoveries of nil (2018 - $14 million). Restructuring costs incurred in 2019 pertained to severance costs as the Corporation continued to align its cost structure to reflect reduced activity levels. In 2018, the Corporation had other recoveries of $14 million relating to the recovery of transactions costs resulting from the termination of an arrangement agreement to acquire an oilfield services drilling contractor.

Finance Charges

Finance Charges	12 Months Ended
	Dec. 31, 2019
Finance Costs [Abstract]
Finance Charges	NOTE 12. FINANCE CHARGES 2019 2018 Interest: Long-term debt $ 110,730 $ 121,810 Lease obligation 3,389 — Other 21 378 Income (1,576 ) (1,444 ) Amortization of debt issue costs 5,889 6,434 Finance charges $ 118,453 $ 127,178

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Disclosure Of Leases [Abstract]
Leases	NOTE 13. LEASES (a) As a lessee Precision recognizes right of use assets primarily from its leases of real estate and vehicles and equipment. Real Estate Vehicles and Equipment Total Balance, January 1, 2019 $ — $ — $ — Transition adjustments 58,635 14,829 73,464 Additions — 1,947 1,947 Derecognition (29 ) — (29 ) Depreciation (4,055 ) (4,403 ) (8,458 ) Lease remeasurements 163 — 163 Effect of foreign currency exchange differences (688 ) (257 ) (945 ) Balance, December 31, 2019 $ 54,026 $ 12,116 $ 66,142 Precision’s real estate lease contracts often contain renewal options which may impact the determination of the lease term for purposes of calculating the lease obligation. If it is reasonably certain that a renewal option will be exercised, the renewal period is included in the lease term. When entering into a lease, Precision assesses whether it is reasonably certain renewal options will be exercised. Reasonable certainty is established if all relevant facts and circumstances indicate an economic incentive to exercise the renewal option. For the majority of its real estate leases, Precision is reasonably certain it will exercise its renewal option. Accordingly, the renewal period has been included in the lease term used to calculate the lease obligation. For the period ended December 31, 2019, Precision had total cash outflows of $10 million in relation to its lease obligations. The Corporation has commitments under various lease agreements, primarily for real estate and vehicles and equipment. Terms of our real estate leases run for a period of one to 10 years while the vehicle leases are typically for terms of between three and four years. Expected non-cancellable operating lease payments are as follows: 2019 2018 Less than one year $ 11,954 $ 13,496 One to five years 33,566 36,639 More than five years 11,117 17,797 $ 56,637 $ 67,932 (b) As a lessor Precision leases its rig equipment under long-term drilling contracts with terms ranging from one to five years. For the year ended December 31, 2019, approximately 59% of our total contract drilling revenue pertained to drilling rigs working under term contracts. At December 31, 2019, the net book value of the underlying rig equipment subject to long-term drilling contracts was $1 billion. The following table sets out a maturity analysis of lease payments, showing the undiscounted lease payments to be received after December 31, 2019. Less than one year $ 297,425 One to five years 207,746 More than five years 12,437 $ 517,608

Share Based Compensation Plans

Share Based Compensation Plans	12 Months Ended
	Dec. 31, 2019
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Abstract]
Share Based Compensation Plans	NOTE 14. SHARE BASED COMPENSATION PLANS In May 2017 shareholders approved an omnibus equity incentive plan (Omnibus Plan) that allows the Corporation to settle short-term incentive awards (annual bonus) and long-term incentive awards (options, performance share units and restricted share units) issued on or after February 8, 2017 in voting shares of Precision (either issued from treasury or purchased in the open market), cash, or a combination of both. Precision intends to settle all short-term incentive, restricted share unit and non-executive performance share unit awards issued under the Omnibus Plan in cash and to settle performance share awards issued to senior executives and all options in voting shares. No further grants will be made under the legacy stock option plan, performance share unit plan or restricted share unit plan. Liability Classified Plans Restricted Share Units Performance Share Units Non- Management Directors’ DSUs Total Balance, December 31, 2017 $ 6,950 $ 11,407 $ 3,512 $ 21,869 Expensed during the period 5,223 398 769 6,390 Payments (6,764 ) (7,284 ) (1,800 ) (15,848 ) Balance, December 31, 2018 5,409 4,521 2,481 12,411 Expensed during the period 5,755 1,583 855 8,193 Payments (3,846 ) (3,246 ) — (7,092 ) Balance, December 31, 2019 $ 7,318 $ 2,858 $ 3,336 $ 13,512 Current $ 3,956 $ 726 $ — $ 4,682 Long-term 3,362 2,132 3,336 8,830 $ 7,318 $ 2,858 $ 3,336 $ 13,512 (a) Restricted Share Units and Performance Share Units Precision has two cash-settled share based incentive plans for officers and other eligible employees. Under the Restricted Share Unit (RSU) incentive plan, shares granted to eligible employees vest annually over a three-year term. Vested shares are automatically paid out in cash at a value determined by the fair market value of the shares at the vesting date. Under the Performance Share Unit (PSU) incentive plan, shares granted to eligible employees vest at the end of a three-year term. Vested shares are automatically paid out in cash in the first quarter following the vested term at a value determined by the fair market value of the shares at the vesting date and based on the number of performance shares held multiplied by a performance factor that ranges from zero to two times. The performance factor is based on Precision’s share price performance compared to a peer group over the three-year period. A summary of the RSUs and PSUs outstanding under these share based incentive plans is presented below: RSUs Outstanding PSUs Outstanding December 31, 2017 2,796,858 5,726,259 Granted 2,918,912 1,292,550 Redeemed (1,404,284 ) (2,137,163 ) Forfeited (255,572 ) (338,656 ) December 31, 2018 4,055,914 4,542,990 Granted 4,187,350 2,038,900 Redeemed (1,505,683 ) (1,322,758 ) Forfeited (399,518 ) (1,923,782 ) December 31, 2019 6,338,063 3,335,350 (b) Non-Management Directors Precision has a deferred share unit (DSU) plan for non-management directors whereby fully vested DSUs are granted quarterly based on an election by the non-management director to receive all or a portion of his or her compensation in DSUs. These DSUs are redeemable in cash or for an equal number of common shares upon the director’s retirement. The redemption of DSUs in cash or common shares is solely at Precision’s discretion. Non-management directors can receive a lump sum payment or two separate payments any time up until December 15 of the year following retirement. If the non-management director does not specify a redemption date, the DSUs will be redeemed on a single date six months after retirement. The cash settlement amount is based on the weighted average trading price for Precision’s shares on the Toronto Stock Exchange for the five days immediately prior to payout. A summary of the DSUs outstanding under this share based incentive plan is presented below: Deferred Share Units Outstanding Balance December 31, 2017 953,277 Granted 474,766 Redeemed (374,408 ) Balance December 31, 2018 1,053,635 Granted 738,619 Balance December 31, 2019 1,792,254 Equity Settled Plans (c) Option Plan Under this plan, the exercise price of each option equals the fair market value of the option at the date of grant determined by the weighted average trading price for the five days preceding the grant. The options are denominated in either Canadian or U.S. dollars, and vest over a period of three years from the date of grant, as employees render continuous service to the Corporation, and have a term of seven years. A summary of the status of the equity incentive plan is presented below: Canadian Share Options Options Outstanding Range of Exercise Prices Weighted Average Exercise Price Options Exercisable December 31, 2017 4,900,360 $ 4.46 – 14.50 $ 8.50 3,734,019 Granted 490,200 4.35 – 4.35 4.35 Forfeited (657,404 ) 10.44 – 14.50 10.58 December 31, 2018 4,733,156 4.35 – 14.31 7.78 3,786,473 Forfeited (711,572 ) 7.15 – 10.67 10.51 December 31, 2019 4,021,584 $ 4.35 – 14.31 $ 7.29 3,569,069 U.S. Share Options Options Outstanding Range of Exercise Prices (US$) Weighted Average Exercise Price (US$) Options Exercisable December 31, 2017 5,558,621 $ 3.21 – 15.21 $ 6.16 2,891,808 Granted 1,569,250 3.44 – 3.62 3.45 Exercised (66,000 ) 3.21 – 3.21 3.21 Forfeited (996,021 ) 3.21 – 15.21 8.08 December 31, 2018 6,065,850 3.21 – 10.74 5.17 3,224,078 Granted 599,300 2.56 – 2.56 2.56 Forfeited (302,100 ) 7.79 – 10.74 10.68 December 31, 2019 6,363,050 $ 2.56 – 9.18 $ 4.67 4,348,824 No options were exercised in 2019. The weighted average share price at the date of exercise for the U.S. share options exercised in 2018 was Canadian Share Options Total Options Outstanding Options Exercisable Range of Exercise Prices: Number Weighted Average Exercise Price Weighted Average Remaining Contractual Life (Years) Number Weighted Average Exercise Price $ 4.35 – 6.99 1,105,400 $ 4.41 4.04 778,595 $ 4.44 7.00 – 8.99 1,533,334 7.32 2.59 1,407,624 7.32 9.00 – 14.31 1,382,850 9.57 0.56 1,382,850 9.57 $ 4.35 – 14.31 4,021,584 $ 7.29 2.29 3,569,069 $ 7.56 U.S. Share Options Total Options Outstanding Options Exercisable Range of Exercise Prices (US$): Number Weighted Average Exercise Price (US$) Weighted Average Remaining Contractual Life (Years) Number Weighted Average Exercise Price (US$) $ 2.56 – 3.99 3,646,250 $ 3.21 4.50 2,011,540 $ 3.27 4.00 – 6.99 1,924,500 5.61 3.37 1,544,984 5.62 7.00 – 9.18 792,300 9.08 0.60 792,300 9.08 $ 2.56 – 9.18 6,363,050 $ 4.67 3.67 4,348,824 $ 5.17 The per option weighted average fair value of the share options granted during 2019 was $1.54 (2018 – $1.96) estimated on the grant date using the Black-Scholes option pricing model with the following assumptions: average risk-free interest rate of 2.5% (2018 – 2%), average expected life of four years (2018 – four years), expected forfeiture rate of 5% (2018 – 5%) and expected volatility of 57% (2018 – 56%). Included in net earnings for the year ended December 31, 2019 is an expense of $2 million (2018 – $3 million). (d) Executive Performance Share Units Precision grants PSUs to certain senior executives with the intention of settling them in voting shares of the Corporation either issued from treasury or purchased in the open market. These PSUs vest over a three year period and incorporate performance criteria established at the date of grant that can adjust the number of performance share units available for settlement from zero to two times the amount originally granted. A summary of the activity under this share based incentive plan is presented below: Executive Performance Share Units Outstanding Weighted Fair Value December 31, 2017 1,159,000 $ 6.00 Granted 2,082,800 6.22 Forfeited (50,733 ) 6.12 December 31, 2018 3,191,067 6.14 Granted 4,211,600 4.11 Forfeited (25,767 ) 6.02 December 31, 2019 7,376,900 4.98 The per unit weighted average fair value of the performance share units granted during 2019 was $4.11 (2018 – $6.22) estimated on the grant date using a Monte Carlo simulation and Black-Scholes option pricing model with the following assumptions: share price of $3.23 (2018 – $4.29), average risk-free interest rate of 2.3% (2018 – 2.3%), average expected life of three years (2018 – three years), average expected volatility of 56% (2018 – 59%), and an expected dividend yield of nil (2018 – nil). Included in net earnings for year ended December 31, 2019 is an expense of $12 million (2018 - $6 million). (e) Non-Management Directors Prior to January 1, 2012, Precision had a deferred share unit plan for non-management directors. Under the plan, fully vested deferred share units were granted quarterly based on an election by the non-management director to receive all or a portion of his or her compensation in deferred share units. These deferred share units are redeemable into an equal number of common shares any time after the director’s retirement. A summary of this share based incentive plan is presented below: Deferred Share Units Outstanding December 31, 2017 195,743 Redeemed (102,570 ) December 31, 2018 and 2019 93,173 Employee Share Purchase Plan The Corporation has an employee share purchase plan to encourage employees to become Precision shareholders and to attract and retain people. Under the plan, eligible employees can contribute up to 10% of their regular base salary through payroll deduction with Precision matching 20% of the employee’s contribution. These contributions are used to purchase the Corporation’s shares in the open market. No vesting conditions apply. During 2019, the Corporation recorded compensation expense of $1 million (2018 – $1 million) related to this plan.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Net Deferred Tax Assets And Liabilities [Abstract]
Income Taxes	NOTE 15. INCOME TAXES The provision for income taxes differs from that which would be expected by applying statutory Canadian income tax rates. A reconciliation of the difference for the years ended December 31, is as follows: 2019 2018 Loss before income taxes $ (8,339 ) $ (323,596 ) Federal and provincial statutory rates 27 % 27 % Tax at statutory rates $ (2,252 ) $ (87,371 ) Adjusted for the effect of: Non-deductible expenses 1,597 49,455 Non-taxable capital gains (1,408 ) (845 ) Impact of foreign tax rates (13,549 ) 4,861 Withholding taxes 1,262 1,061 Taxes related to prior years (1,975 ) 3,803 Other 1,368 (290 ) Income tax recovery $ (14,957 ) $ (29,326 ) In 2019, the Province of Alberta announced various reductions to corporate income tax rates, that when fully implemented over the next three years will decrease the provincial corporate income tax rate from 12% to 8% by 2022. The impact of this rate reduction is nominal and has been reflected in the current year tax recovery. On December 22, 2017, the United States government enacted new tax legislation which, in addition to changing certain U.S. federal income tax laws, reduced the U.S. federal income tax rate from 35% to 21% effective January 1, 2018. The impact of the lower U.S. federal income tax rate on Precision’s U.S. subsidiaries was reflected as at December 31, 2017. The net deferred tax liability is comprised of the tax effect of the following temporary differences: 2019 2018 Deferred tax liability: Property, plant and equipment and intangibles $ 426,934 $ 467,109 Debt issue costs 3,280 3,534 Partnership deferrals 850 1,730 Other 7,926 5,722 438,990 478,095 Offsetting of assets and liabilities (413,601 ) (405,316 ) 25,389 72,779 Deferred tax assets: Losses (expire from time to time up to 2038) 402,025 423,595 Long-term incentive plan 6,131 6,849 Other 10,169 11,752 418,325 442,196 Offsetting of assets and liabilities (413,601 ) (405,316 ) 4,724 36,880 Net deferred tax liability $ 20,665 $ 35,899 Included in the deferred tax assets at December 31, 2019 is $5 million of tax-effected temporary differences related to the Corporation’s international operations and at December 31, 2018, $37 million related to the Corporation’s U.S. and international operations. The Corporation has certain loss carryforwards in U.S. and international locations and capital loss carry forwards in Canada for which it is unlikely that sufficient future taxable income will be available. Accordingly, the Corporation has not recognized a deferred tax asset on these losses totaling $31 million and $33 million, respectively. The movement in temporary differences is as follows: Property, Plant and Equipment and Intangibles Partnership Deferrals Other Deferred Tax Liabilities Losses Debt Issue Costs Long-Term Incentive Plan Other Deferred Tax Assets Net Deferred Tax Liability Balance, December 31, 2017 $ 454,613 $ (335 ) $ 6,709 $ (368,133 ) $ 3,352 $ (7,935 ) $ (11,182 ) $ 77,089 Recognized in net loss (9,667 ) 2,065 (1,005 ) (30,660 ) 182 1,325 (139 ) (37,899 ) Effect of foreign currency exchange differences 22,163 — 18 (24,802 ) — (239 ) (431 ) (3,291 ) Balance, December 31, 2018 $ 467,109 $ 1,730 $ 5,722 $ (423,595 ) $ 3,534 $ (6,849 ) $ (11,752 ) $ 35,899 Recognized in net earnings (26,825 ) (880 ) 2,216 7,874 (254 ) 572 1,260 (16,037 ) Effect of foreign currency exchange differences (13,350 ) — (12 ) 13,696 — 146 323 803 Balance, December 31, 2019 $ 426,934 $ 850 $ 7,926 $ (402,025 ) $ 3,280 $ (6,131 ) $ (10,169 ) $ 20,665 At December 31, 2019, Precision had unrecognized tax benefits of $nil. At December 31, 2018, Precision had $2 million of unrecognized tax benefits that, if recognized, would have a favourable impact on Precision’s effective income tax rate in future periods. Precision classifies interest accrued on unrecognized tax benefits and income tax penalties as income tax expense. Included in the unrecognized tax benefit, as at December 31, 2018 was interest and penalties of $1 million.

Bank Indebtedness

Bank Indebtedness	12 Months Ended
	Dec. 31, 2019
Debt Instruments Held [Abstract]
Bank Indebtedness	NOTE 16. BANK INDEBTEDNESS At December 31, 2019, Precision had available $40 million (2018 – $40 million) and US$15 million (2018 – US$15 million) under secured operating facilities, and a secured US$30 million (2018 – US$30 million) facility for the issuance of letters of credit and performance and bid bonds to support international operations. As at December 31, 2019 and 2018, no amounts had been drawn on any of the facilities. Availability of the $40 million and US$30 million facility were reduced by outstanding letters of credit in the amount of $26 million (2018 – $28 million) and US$2 million (2018 – US$2 million), respectively. The facilities are primarily secured by charges on substantially all present and future property of Precision and its material subsidiaries. Advances under the $40 million facility are available at the bank’s prime lending rate, U.S. base rate, U.S. LIBOR rate plus 80% of applicable margin, or 80% of the applicable margin for Banker’s Acceptances, or in combination, and under the US$15 million facility at the bank’s prime lending rate.

Provisions and Other

Provisions and Other	12 Months Ended
	Dec. 31, 2019
Disclosure Of Other Provisions [Abstract]
Provisions and Other	Workers’ Compensation Balance December 31, 2017 $ 13,232 Expensed during the year 3,359 Payment of deductibles and uninsured claims (4,271 ) Effects of foreign currency exchange differences 1,053 Balance December 31, 2018 13,373 Expensed during the year 4,047 Payment of deductibles and uninsured claims (4,915 ) Effects of foreign currency exchange differences (639 ) Balance December 31, 2019 $ 11,866 2019 2018 Current $ 1,907 $ 2,796 Long-term 9,959 10,577 $ 11,866 $ 13,373 Precision maintains a provision for the deductible and uninsured portions of workers’ compensation and general liability claims. The amount accrued for the provision for losses incurred varies depending on the number and nature of the claims outstanding at the balance sheet dates. In addition, the accrual includes management’s estimate of the future cost to settle each claim such as future changes in the severity of the claim and increases in medical costs. Precision uses third parties to assist in developing the estimate of the ultimate costs to settle each claim, which is based on historical experience associated with the type of each claim and specific information related to each claim. The specific circumstances of each claim may change over time prior to settlement and, as a result, the estimates made as of the balance sheet dates may change.

Shareholders' Capital

Shareholders' Capital	12 Months Ended
	Dec. 31, 2019
Disclosure Of Classes Of Share Capital [Abstract]
Shareholders' Capital	NOTE 18. SHAREHOLDERS’ CAPITAL (a) Authorized – unlimited number of voting common shares – unlimited number of preferred shares, issuable in series, limited to an amount equal to one half of the issued and outstanding common shares (b) Issued Common shares Number Amount Balance, December 31, 2017 293,238,858 $ 2,319,293 Issued on redemption of non-management directors' DSUs 476,978 2,609 Options exercised – cash consideration 66,000 275 – reclassification from contributed surplus — 103 Balance, December 31, 2018 293,781,836 $ 2,322,280 Share repurchase (16,482,032 ) (25,902 ) Balance, December 31, 2019 277,299,804 $ 2,296,378 (c) Normal Course Issuer Bid In 2019, the Toronto Stock Exchange (“TSX”) approved Precision’s application to implement a Normal Course Issuer Bid (“NCIB”). Under the terms of the NCIB, Precision may purchase and cancel up to a maximum of 29,170,887 common shares, representing 10% of the public float of common shares at the time the NCIB was approved. The NCIB commenced on August 27, 2019 and will terminate no later than August 26, 2020. Purchases under the NCIB were made through the facilities of the TSX, the New York Stock Exchange and various other designated exchanges in accordance with applicable regulatory requirements at a price per common share representative of the market price at the time of acquisition. Pursuant to the NCIB, 16 million common shares were purchased and cancelled as of December 31, 2019 for $26 million. Subsequent to December 31, 2019, Precision purchased and cancelled an additional 3 million common shares, under the NCIB, for $5 million.

Per Share Amounts

Per Share Amounts	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Per Share Amounts	NOTE 19. PER SHARE AMOUNTS The following tables reconcile the net earnings (loss) and weighted average shares outstanding used in computing basic and diluted earnings (loss) per share: 2019 2018 Net earnings (loss) – basic and diluted $ 6,618 $ (294,270 ) (Stated in thousands) 2019 2018 Weighted average shares outstanding – basic 290,782 293,560 Effect of stock options and other equity compensation plans 6,397 — Weighted average shares outstanding – diluted 297,179 293,560

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2019
Text Block1 [Abstract]
Accumulated Other Comprehensive Income	NOTE 20. ACCUMULATED OTHER COMPREHENSIVE INCOME Unrealized Foreign Currency Translation Gains (Losses) Foreign Exchange Gain (Loss) on Net Investment Hedge Accumulated Other Comprehensive Income December 31, 2017 $ 440,733 $ (309,123 ) $ 131,610 Other comprehensive income 175,630 (145,226 ) 30,404 December 31, 2018 616,363 (454,349 ) 162,014 Other comprehensive loss (106,781 ) 79,022 (27,759 ) December 31, 2019 $ 509,582 $ (375,327 ) $ 134,255

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2019
Employees Benefit Plans [Abstract]
Employee Benefit Plans	NOTE 21. EMPLOYEE BENEFIT PLANS The Corporation has a defined contribution pension plan covering a significant number of its employees. Under this plan, the Corporation matches individual contributions up to 5% of the employee’s eligible compensation. Total expense under the defined contribution plan in 2019 was $13 million (2018 – $12 million).

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 22. RELATED PARTY TRANSACTIONS Compensation of Key Management Personnel The remuneration of key management personnel is as follows: 2019 2018 Salaries and other benefits $ 8,747 $ 6,732 Equity settled share based compensation 9,047 5,562 Cash settled share based compensation 1,432 722 $ 19,226 $ 13,016 Key management personnel are comprised of the directors and executive officers of the Corporation. Certain executive officers have entered into employment agreements with Precision that provide termination benefits of up to 24 months base salary plus up to two times targeted incentive compensation upon dismissal without cause.

Capital Commitments

Capital Commitments	12 Months Ended
	Dec. 31, 2019
Commitments [Abstract]
Capital Commitments	NOTE 23. CAPITAL COMMITMENTS At December 31, 2019, the Corporation had commitments to purchase property, plant and equipment totaling $113 million (2018 – $180 million). Payments of $25 million for these commitments are expected to be made in 2020, $53 million in 2021 and $35 million in 2022.

Financial Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2019
Disclosure Of Financial Instruments [Abstract]
Financial Instruments	NOTE 24. FINANCIAL INSTRUMENTS Financial Risk Management The Board of Directors is responsible for identifying the principal risks of Precision’s business and for ensuring the implementation of systems to manage these risks. With the assistance of senior management, who report to the Board of Directors on the risks of Precision’s business, the Board of Directors considers such risks and discusses the management of such risks on a regular basis. Precision has exposure to the following risks from its use of financial instruments: (a) Credit Risk Accounts receivable includes balances from a large number of customers primarily operating in the oil and natural gas industry. The Corporation manages credit risk by assessing the creditworthiness of its customers before providing services and on an ongoing basis, and by monitoring the amount and age of balances outstanding. In some instances, the Corporation will take additional measures to reduce credit risk including obtaining letters of credit and prepayments from customers. When indicators of credit problems appear, the Corporation takes appropriate steps to reduce its exposure including negotiating with the customer, filing liens and entering into litigation. Precision’s most significant customer accounted for $12 million of the trade receivables amount at December 31, 2019 (2018 – $18 million). The movement in the expected credit loss allowance during the year was as follows: 2019 2018 Balance at January 1, $ 1,470 $ 2,596 Impairment loss recognized 72 483 Amounts written-off as uncollectible (537 ) (416 ) Impairment loss reversed (24 ) (1,247 ) Effect of movement in exchange rates (52 ) 54 Balance at December 31, $ 929 $ 1,470 The ageing of trade receivables at December 31 was as follows: 2019 2018 Gross Provision for Impairment Gross Provision for Impairment Not past due $ 144,292 $ 1 $ 175,277 $ — Past due 0 – 30 days 47,965 8 64,351 — Past due 31 – 120 days 19,166 28 25,032 71 Past due more than 120 days 1,303 892 1,399 1,399 $ 212,726 $ 929 $ 266,059 $ 1,470 (b) Interest Rate Risk As at December 31, 2019 and 2018, all of Precision’s outstanding long-term debt bears fixed interest rates. As a result, Precision is not exposed to significant fluctuations in interest expense as a result of changes in interest rates. The Corporation would have exposure to interest rates if it were to draw upon its Senior Credit Facility. (c) Foreign Currency Risk The Corporation is primarily exposed to foreign currency fluctuations in relation to the working capital of its foreign operations and certain long-term debt facilities of its Canadian operations. The Corporation has no significant exposures to foreign currencies other than the U.S. dollar. The Corporation monitors its foreign currency exposure and attempts to minimize the impact by aligning appropriate levels of U.S. denominated debt with cash flows from U.S. based operations. The following financial instruments were denominated in U.S. dollars: 2019 2018 Canadian Operations Foreign Operations Canadian Operations Foreign Operations Cash US $ 9,727 US $ 41,154 US $ 957 US $ 49,302 Accounts receivable 242 150,873 482 181,609 Accounts payable and accrued liabilities (17,730 ) (86,324 ) (20,655 ) (122,417 ) Long-term liabilities, excluding long-term incentive plans (1) — (7,669 ) — (7,747 ) Net foreign currency exposure US $ (7,761 ) US $ 98,034 US $ (19,216 ) US $ 100,747 Impact of $0.01 change in the U.S. dollar to Canadian dollar exchange rate on net earnings (loss) $ (78 ) $ — $ (192 ) $ — Impact of $0.01 change in the U.S. dollar to Canadian dollar exchange rate on comprehensive loss $ — $ 980 $ — $ 1,007 (1) Excludes U.S. dollar long-term debt that has been designated as a hedge of the Corporation’s net investment in certain self-sustaining foreign operations. (d) Liquidity Risk Liquidity risk is the exposure of the Corporation to the risk of not being able to meet its financial obligations as they become due. The Corporation manages liquidity risk by monitoring and reviewing actual and forecasted cash flows to ensure there are available cash resources to meet these needs. The following are the contractual maturities of the Corporation’s financial liabilities and other contractual commitments as at December 31, 2019: 2020 2021 2022 2023 2024 Thereafter Total Accounts payable and accrued liabilities $ 199,478 $ — $ — $ — $ — $ — $ 199,478 Share based compensation 5,130 6,649 6,026 — — — 17,805 Long-term debt (1) 32,463 85,215 — 447,792 399,545 480,112 1,445,127 Interest on long-term debt (2) (3) 95,427 95,196 89,888 88,442 52,562 35,633 457,148 Commitments 36,812 64,098 45,346 6,643 5,195 11,117 169,211 Total $ 369,310 $ 251,158 $ 141,260 $ 542,877 $ 457,302 $ 526,862 $ 2,288,769 (1) At December 31, 2019, Precision committed to redeem US$25 million of its 6.5% unsecured senior notes due 2021 in the first quarter of 2020. (2) Calculated based on December 31, 2019 debt balance less first quarter unsecured senior notes redemptions, interest rates, and foreign exchange rates in effect as at December 31, 2019. (3) Excludes amortization of long-term debt issue costs. Fair Values The carrying value of cash, accounts receivable, and accounts payable and accrued liabilities approximates their fair value due to the relatively short period to maturity of the instruments. The fair value of the unsecured senior notes at December 31, 2019 was approximately $1,428 million (2018 – $1,548 million). Financial assets and liabilities recorded or disclosed at fair value in the consolidated statements of financial position are categorized based on the level of judgment associated with the inputs used to measure their fair value. Hierarchical levels are based on the amount of subjectivity associated with the inputs in the fair determination and are as follows: Level I – Inputs are unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date. Level II – Inputs (other than quoted prices included in Level I) are either directly or indirectly observable for the asset or liability through correlation with market data at the measurement date and for the duration of the instrument’s anticipated life. Level III – Inputs reflect management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration is given to the risk inherent in the valuation technique and the risk inherent in the inputs to the model. The estimated fair value of Unsecured Senior Notes is based on level II inputs. The fair value is estimated considering the risk free interest rates on government debt instruments of similar maturities, adjusted for estimated credit risk, industry risk and market risk premiums.

Capital Management

Capital Management	12 Months Ended
	Dec. 31, 2019
Capital Management [Abstract]
Capital Management	NOTE 25. CAPITAL MANAGEMENT The Corporation’s strategy is to carry a capital base to maintain investor, creditor and market confidence and to sustain future development of the business. The Corporation seeks to maintain a balance between the level of long-term debt and shareholders’ equity to ensure access to capital markets to fund growth and working capital given the cyclical nature of the oilfield services sector. The Corporation strives to maintain a conservative ratio of long-term debt to long-term debt plus equity. As at December 31, 2019 and 2018, these ratios were as follows: 2019 2018 Long-term debt $ 1,427,181 $ 1,706,253 Shareholders’ equity 1,527,432 1,557,752 Total capitalization $ 2,954,613 $ 3,264,005 Long-term debt to long-term debt plus equity ratio 0.48 0.52 As at December 31, 2019, liquidity remained sufficient as Precision had $75 million (2018 – $97 million) in cash and access to the US$500 million Senior Credit Facility (2018 – US$500 million) and $98 million (2018 – $101 million) secured operating facilities. As at December 31, 2019, no amounts (2018 – US$ nil) were drawn on the Senior Credit Facility with availability reduced by US$25 million (2018 – US$28 million) in outstanding letters of credit. Availability of the $40 million secured operating facility and US$30 million secured facility for the issuance of letters of credit and performance and bid bonds were reduced by outstanding letters of credit of $26 million (2018 – $28 million) and US$2 million (2018 – US$2 million), respectively. There was no amount drawn on the US$15 million secured operating facility.

Supplemental Information

Supplemental Information	12 Months Ended
	Dec. 31, 2019
Disclosure Of Supplemental Information [Abstract]
Supplemental Information	NOTE 26. SUPPLEMENTAL INFORMATION Components of changes in non-cash working capital balances are as follows: 2019 2018 Accounts receivable $ 51,152 $ (32,709 ) Inventory 1,157 (7,504 ) Accounts payable and accrued liabilities (61,376 ) 23,225 $ (9,067 ) $ (16,988 ) Pertaining to: Operations $ (4,493 ) $ (17,880 ) Investments (4,574 ) 892 The components of accounts receivable are as follows: 2019 2018 Trade $ 211,797 $ 264,589 Accrued trade 32,167 47,426 Prepaids and other 66,240 60,321 $ 310,204 $ 372,336 The components of accounts payable and accrued liabilities are as follows: 2019 2018 Accounts payable $ 91,468 $ 129,493 Accrued liabilities: Payroll 54,334 73,682 Other 53,676 71,314 $ 199,478 $ 274,489 Precision presents expenses in the consolidated statements of earnings by function with the exception of depreciation and amortization, gain on asset disposals, loss on asset decommissioning and reversal of impairment of property, plant and equipment, which are presented by nature. Operating expense and general and administrative expense would include $282 million and $15 million (2018 – $358 million and $7 million), respectively, of depreciation and amortization, gain on asset disposals, loss on asset decommissioning and reversal of impairment of property, plant and equipment if the statements of earnings (loss) were presented purely by function. The following table presents operating and general and administrative expenses by nature: 2019 2018 Wages, salaries and benefits $ 697,935 $ 728,101 Purchased materials, supplies and services 429,365 422,359 Share based compensation 22,115 15,598 $ 1,149,415 $ 1,166,058 Allocated to: Operating expense $ 1,038,967 $ 1,067,264 General and administrative 104,010 111,830 Restructuring 6,438 1,164 Other recoveries — (14,200 ) $ 1,149,415 $ 1,166,058

Contingencies and Guarantees

Contingencies and Guarantees	12 Months Ended
	Dec. 31, 2019
Disclosure Of Contingent Liabilities [Abstract]
Contingencies and Guarantees	NOTE 27. CONTINGENCIES AND GUARANTEES The business and operations of the Corporation are complex and the Corporation has executed a number of significant financings, business combinations, acquisitions and dispositions over the course of its history. The computation of income taxes payable as a result of these transactions involves many complex factors as well as the Corporation’s interpretation of relevant tax legislation and regulations. The Corporation’s management believes that the provision for income tax is adequate and in accordance with IFRS and applicable legislation and regulations. However, there are tax filing positions that have been and can still be the subject of review by taxation authorities who may successfully challenge the Corporation’s interpretation of the applicable tax legislation and regulations, with the result that additional taxes could be payable by the Corporation. The Corporation, through the performance of its services, product sales and business arrangements, is sometimes named as a defendant in litigation. The outcome of such claims against the Corporation is not determinable at this time; however, their ultimate resolution is not expected to have a material adverse effect on the Corporation. The Corporation has entered into agreements indemnifying certain parties primarily with respect to tax and specific third-party claims associated with businesses sold by the Corporation. Due to the nature of the indemnifications, the maximum exposure under these agreements cannot be estimated. No amounts have been recorded for the indemnities as the Corporation’s obligations under them are not probable or estimable.

Long-Term Debt Guarantor Disclo

Long-Term Debt Guarantor Disclosure	12 Months Ended
	Dec. 31, 2019
Long Term Debt Guarantor Disclosure [Abstract]
Long-Term Debt Guarantor Disclosure	NOTE 28. LONG-TERM DEBT GUARANTOR DISCLOSURE Condensed Consolidated Statement of Financial Position as at December 31, 2019 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Assets Cash $ 20,952 $ 20,651 $ 33,098 $ — $ 74,701 Other current assets 3,952 242,968 96,140 4 343,064 Intercompany receivables 82,101 2,205,834 67,377 (2,355,312 ) — Investments in subsidiaries 4,535,625 30 — (4,535,655 ) — Property, plant and equipment 48,416 2,263,355 437,413 279 2,749,463 Intangibles 30,434 1,312 — — 31,746 Right of use assets 23,070 39,267 3,805 — 66,142 Other long-term assets — — 6,595 (1,871 ) 4,724 Total assets $ 4,744,550 $ 4,773,417 $ 644,428 $ (6,892,555 ) $ 3,269,840 Liabilities and shareholders’ equity Current liabilities $ 33,862 $ 130,232 $ 51,975 $ — $ 216,069 Intercompany payables and debt 2,217,790 84,901 52,621 (2,355,312 ) — Long-term debt 1,427,181 — — — 1,427,181 Lease obligation 20,877 31,614 2,489 — 54,980 Other long-term liabilities 26,927 18,454 668 (1,871 ) 44,178 Total liabilities 3,726,637 265,201 107,753 (2,357,183 ) 1,742,408 Shareholders’ equity 1,017,913 4,508,216 536,675 (4,535,372 ) 1,527,432 Total liabilities and shareholders’ equity $ 4,744,550 $ 4,773,417 $ 644,428 $ (6,892,555 ) $ 3,269,840 Condensed Consolidated Statement of Financial Position as at December 31, 2018 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Assets Cash $ 28,626 $ 37,138 $ 30,862 $ — $ 96,626 Other current assets 4,798 308,450 93,166 3 406,417 Intercompany receivables 51,616 1,887,405 80,735 (2,019,756 ) — Investments in subsidiaries 4,522,964 68 — (4,523,032 ) — Assets held for sale — 19,658 — — 19,658 Property, plant and equipment 55,430 2,541,060 441,509 613 3,038,612 Intangibles 33,548 1,853 — — 35,401 Other long-term assets — 46,620 5,479 (12,770 ) 39,329 Total assets $ 4,696,982 $ 4,842,252 $ 651,751 $ (6,554,942 ) $ 3,636,043 Liabilities and shareholders’ equity Current liabilities $ 42,211 $ 190,239 $ 49,712 $ — $ 282,162 Intercompany payables and debt 1,918,306 60,101 41,349 (2,019,756 ) — Long-term debt 1,706,253 — — — 1,706,253 Other long-term liabilities 88,983 13,160 503 (12,770 ) 89,876 Total liabilities 3,755,753 263,500 91,564 (2,032,526 ) 2,078,291 Shareholders’ equity 941,229 4,578,752 560,187 (4,522,416 ) 1,557,752 Total liabilities and shareholders’ equity $ 4,696,982 $ 4,842,252 $ 651,751 $ (6,554,942 ) $ 3,636,043 Condensed Consolidated Statement of Net Earnings (Loss) for the year ended December 31, 2019 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Revenue $ 92 $ 1,341,624 $ 210,292 $ (10,688 ) $ 1,541,320 Operating expense 56 909,898 139,701 (10,688 ) 1,038,967 General and administrative 38,418 57,119 8,473 — 104,010 Restructuring 2,822 3,616 — — 6,438 Earnings (loss) before income taxes, equity in earnings of subsidiaries, 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 (41,204 ) 370,991 62,118 — 391,905 Depreciation and amortization 13,272 262,914 57,205 225 333,616 Gain on asset disposals (47 ) (50,439 ) (255 ) — (50,741 ) Loss on asset decommissioning — 20,263 — — 20,263 Reversal of impairment of property, plant and equipment — (5,810 ) — — (5,810 ) Foreign exchange (8,499 ) (758 ) 535 — (8,722 ) Finance charges 118,775 (354 ) 32 — 118,453 Gain on redemption and repurchase of unsecured senior notes (6,815 ) — — — (6,815 ) Equity in earnings of subsidiaries (102,114 ) — — 102,114 — Earnings (loss) before income taxes (55,776 ) 145,175 4,601 (102,339 ) (8,339 ) Income taxes (62,619 ) 44,809 2,853 — (14,957 ) Net earnings (loss) $ 6,843 $ 100,366 $ 1,748 $ (102,339 ) $ 6,618 Condensed Consolidated Statement of Net Loss for the year ended December 31, 2018 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Revenue $ 104 $ 1,356,913 $ 191,131 $ (6,959 ) $ 1,541,189 Operating expense 83 949,451 124,689 (6,959 ) 1,067,264 General and administrative 52,638 48,748 10,444 — 111,830 Restructuring — 1,164 — — 1,164 Other recoveries (14,200 ) — — — (14,200 ) Earnings (loss) before income taxes, equity in loss of subsidiaries, gain on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of goodwill, gain on asset disposals and depreciation and amortization (38,417 ) 357,550 55,998 — 375,131 Depreciation and amortization 12,196 304,070 60,562 216 377,044 Gain on asset disposals (5,314 ) (6,051 ) (19 ) — (11,384 ) Impairment of goodwill — 207,544 — — 207,544 Foreign exchange 4,819 (443 ) (359 ) — 4,017 Finance charges 126,758 (233 ) 653 — 127,178 Gain on redemption and repurchase of unsecured senior notes (5,672 ) — — — (5,672 ) Equity in loss of subsidiaries 168,975 — — (168,975 ) — Loss before income taxes (340,179 ) (147,337 ) (4,839 ) 168,759 (323,596 ) Income taxes (46,125 ) 13,863 2,936 — (29,326 ) Net loss $ (294,054 ) $ (161,200 ) $ (7,775 ) $ 168,759 $ (294,270 ) Condensed Consolidated Statement of Comprehensive Income (Loss) for the year ended December 31, 2019 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Net earnings $ 6,843 $ 100,366 $ 1,748 $ (102,339 ) $ 6,618 Other comprehensive income (loss) 79,022 (79,018 ) (27,655 ) (108 ) (27,759 ) Comprehensive income (loss) $ 85,865 $ 21,348 $ (25,907 ) $ (102,447 ) $ (21,141 ) Condensed Consolidated Statement of Comprehensive Income (Loss) for the year ended December 31, 2018 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Net loss $ (294,054 ) $ (161,200 ) $ (7,775 ) $ 168,759 $ (294,270 ) Other comprehensive income (loss) (145,226 ) 129,804 45,190 636 30,404 Comprehensive income (loss) $ (439,280 ) $ (31,396 ) $ 37,415 $ 169,395 $ (263,866 ) Condensed Consolidated Statement of Cash Flow for the year ended December 31, 2019 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Cash provided by (used in): Operations $ (189,376 ) $ 480,215 $ (2,680 ) $ — $ 288,159 Investments 408,753 (56,937 ) (15,337 ) (410,979 ) (74,500 ) Financing (226,379 ) (438,350 ) 21,936 410,979 (231,814 ) Effect of exchange rate changes on cash and cash equivalents (672 ) (1,415 ) (1,683 ) — (3,770 ) Increase (decrease) in cash and cash equivalents (7,674 ) (16,487 ) 2,236 — (21,925 ) Cash and cash equivalents, beginning of year 28,626 37,138 30,862 — 96,626 Cash and cash equivalents, end of year $ 20,952 $ 20,651 $ 33,098 $ — $ 74,701 Condensed Consolidated Statement of Cash Flow for the year ended December 31, 2018 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Cash provided by (used in): Operations $ (102,901 ) $ 351,782 $ 44,453 $ — $ 293,334 Investments 277,501 (75,740 ) (16,253 ) (286,302 ) (100,794 ) Financing (169,085 ) (247,017 ) (39,285 ) 286,302 (169,085 ) Effect of exchange rate changes on cash and cash equivalents 2,268 2,691 3,131 — 8,090 Increase (decrease) in cash and cash equivalents 7,783 31,716 (7,954 ) — 31,545 Cash and cash equivalents, beginning of year 20,843 5,422 38,816 — 65,081 Cash and cash equivalents, end of year $ 28,626 $ 37,138 $ 30,862 $ — $ 96,626

Subsidiaries

Subsidiaries	12 Months Ended
	Dec. 31, 2019
Disclosure Of Significant Investments In Subsidiaries [Abstract]
Subsidiaries	NOTE 29. SUBSIDIARIES Significant Subsidiaries Ownership Interest Country of Incorporation 2019 2018 Precision Limited Partnership Canada 100 100 Precision Drilling Canada Limited Partnership Canada 100 100 Precision Diversified Oilfield Services Corp. Canada 100 100 Precision Directional Services Ltd. Canada 100 100 Precision Drilling (US) Corporation United States 100 100 Precision Drilling Holdings Company United States 100 100 Precision Drilling Company LP United States 100 100 Precision Completion & Production Services Ltd. United States 100 100 Precision Directional Services, Inc. United States 100 100 Grey Wolf Drilling Limited Barbados 100 100 Grey Wolf Drilling (Barbados) Ltd. Barbados 100 100

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Significant Accounting Policies [Abstract]
Basis of Consolidation	(a) Basis of Consolidation These consolidated financial statements include the accounts of the Corporation and all of its subsidiaries and partnerships, substantially all of which are wholly-owned. The financial statements of the subsidiaries are prepared for the same period as the parent entity, using consistent accounting policies. All significant intercompany balances and transactions and any unrealized gains and losses arising from intercompany transactions, have been eliminated. Subsidiaries are entities controlled by the Corporation. Control exists when Precision has the power to govern the financial and operating policies of an entity so as to obtain benefits from its activities. In assessing control, potential voting rights that currently are exercisable are considered. The financial statements of subsidiaries are included in the consolidated financial statements from the date that control commences until the date that control ceases. Precision does not hold investments in any companies where it exerts significant influence and does not hold interests in any special-purpose entities. The acquisition method is used to account for acquisitions of subsidiaries and assets that meet the definition of a business under IFRS. The cost of an acquisition is measured as the fair value of the assets given, equity instruments issued, and liabilities incurred or assumed at the date of exchange. Identifiable assets acquired and liabilities and contingent liabilities assumed in a business combination are measured initially at their fair values at the acquisition date. The excess of the cost of acquisition over the fair value of the identifiable assets, liabilities and contingent liabilities acquired is recorded as goodwill. If the cost of acquisition is less than the fair value of the net assets of the subsidiary acquired, the difference is recognized immediately in the statement of earnings. Transaction costs, other than those associated with the issuance of debt or equity securities, that the Corporation incurs in connection with a business combination are expensed as incurred.
Cash and Cash Equivalents	(b) Cash and Cash Equivalents Cash and cash equivalents consist of cash and short-term investments with original maturities of three months or less.
Inventory	(c) Inventory Inventory is primarily comprised of operating supplies and carried at the lower of average cost, being the cost to acquire the inventory, and net realizable value. Inventory is charged to operating expenses as items are sold or consumed at the amount of the average cost of the item.
Property, Plant and Equipment	(d) Property, Plant and Equipment Property, plant and equipment are carried at cost, less accumulated depreciation and any accumulated impairment losses. Cost includes an expenditure that is directly attributable to the acquisition of the asset. The cost of self-constructed assets includes the cost of materials and direct labour, any other costs directly attributable to bringing the assets to a working condition for their intended use, and borrowing costs on qualifying assets. The cost of replacing a part of an item of property, plant and equipment is recognized in the carrying amount of the item if it is probable that the future economic benefits embodied within the part will flow to the Corporation, and its cost can be measured reliably. The carrying amount of the replaced part is derecognized. The costs of the day-to-day servicing of property, plant and equipment (repair and maintenance) are recognized in profit or loss as incurred. Property, plant, and equipment are depreciated as follows: Expected Life Salvage Value Basis of Depreciation Drilling rig equipment: – Power & Tubulars 5 years – straight-line – Dynamic 10 years – straight-line – Structural 20 years 10% straight-line Service rig equipment 20 years 10% straight-line Drilling rig spare equipment up to 15 years – straight-line Service rig spare equipment up to 15 years – straight-line Rental equipment up to 15 years 0 to 25% straight-line Other equipment 3 to 10 years – straight-line Light duty vehicles 4 years – straight-line Heavy duty vehicles 7 to 10 years – straight-line Buildings 10 to 20 years – straight-line Property, plant and equipment are depreciated based on estimates of useful lives and salvage values. These estimates consider data and information from various sources including vendors, industry practice, and Precision’s own historical experience and may change as more experience is gained, market conditions shift, or technological advancements are made. Gains and losses on disposal of an item of property, plant and equipment are determined by comparing the proceeds from disposal to the carrying amount of property, plant and equipment, and are recognized in the consolidated statements of earnings (loss). Determination of which parts of the drilling rig equipment represent significant cost relative to the entire rig and identifying the consumption patterns along with the useful lives of these significant parts, are matters of judgment. This determination can be complex and subject to differing interpretations and views, particularly when rig equipment comprises individual components for which different depreciation methods or rates are appropriate. The estimated useful lives, residual values and method and components of depreciation are reviewed annually, and adjusted prospectively if appropriate.
Intangibles	(e) Intangibles Intangible assets that are acquired by the Corporation with finite lives are initially recorded at estimated fair value and subsequently measured at cost less accumulated amortization and any accumulated impairment losses. Subsequent expenditures are capitalized only when they increase the future economic benefits of the specific asset to which they relate. Intangible assets are amortized based on estimates of useful lives. These estimates consider data and information from various sources including vendors and Precision’s own historical experience and may change as more experience is gained or technological advancements are made. Amortization is recognized in profit and loss using the straight-line method over the estimated useful lives of the respective assets. Precision’s loan commitment fees are amortized over the term of the respective facility. Software is amortized over its expected useful life of up to 10 years. The estimated useful lives and methods of amortization are reviewed annually and adjusted prospectively if appropriate.
Goodwill	(f) Goodwill Goodwill is the amount that results when the purchase price of an acquired business exceeds the sum of the amounts allocated to the assets acquired, less liabilities assumed, based on their fair values. After initial recognition, goodwill is measured at cost less any accumulated impairment losses. For the purpose of impairment testing, goodwill acquired in a business combination is, from the acquisition date, attributed to the cash-generating unit ( CGU
Impairment of Non-Financial Assets	(g) Impairment of Non-Financial Assets The carrying amounts of the Corporation’s non-financial assets, other than inventories and deferred tax assets, are reviewed at each reporting date to determine whether there is any indication of impairment. For the purpose of impairment testing, assets are grouped together into the smallest group of assets that generates cash inflows from continuing use that are largely independent of the cash inflows of other assets or groups of assets (the cash-generating unit). Judgment is required in the aggregation of assets into CGUs. If any such indication exists, then the asset or CGU’s recoverable amount is estimated. Judgement is required when evaluating whether a CGU has indications of impairment. For CGUs that contain goodwill and other intangible assets that have indefinite lives or that are not yet available for use, an impairment test is, at a minimum, completed annually as of December 31. The recoverable amount of an asset or a CGU is the greater of its value in use and its fair value less costs to sell. In assessing value in use, the estimated future cash flows are discounted to their present value using an after-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset. Value in use is generally computed by reference to the present value of the future cash flows expected to be derived from the cash-generating unit. An impairment loss is recognized if the carrying amount of an asset or a CGU exceeds its estimated recoverable amount. Impairment losses are recognized in profit or loss. Impairment losses recognized in respect of CGUs are allocated first to reduce the carrying amount of any goodwill allocated to the CGU and then to reduce the carrying amounts of the other assets in the CGU on a pro rata basis. An impairment loss in respect of goodwill is not reversed. In respect of other assets, impairment losses recognized in prior years are assessed at each reporting date for any indications that the loss has decreased or no longer exists. An impairment loss is reversed only to the extent that the asset’s carrying amount does not exceed the carrying amount that would have been determined, net of depreciation or amortization, if no impairment loss had been recognized.
Borrowing Costs	(h) Borrowing Costs Interest and borrowing costs that are directly attributable to the acquisition, construction or production of assets that take a substantial period of time to prepare for their intended use are capitalized as part of the cost of those assets. Capitalization ceases during any extended period of suspension of construction or when substantially all activities necessary to prepare the asset for its intended use are complete. All other interest and borrowing costs are recognized in earnings in the period in which they are incurred.
Income Taxes	(i) Income Taxes Income tax expense is recognized in profit or loss except to the extent that it relates to items recognized directly in equity, in which case it is recognized in equity. Current tax is the expected tax payable or receivable on the taxable earnings or loss for the year, using tax rates enacted or substantively enacted at the reporting date, and any adjustment to tax payable in respect of previous years. Deferred tax is recognized using the asset and liability method, providing for temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for taxation purposes. Deferred tax is not recognized on the initial recognition of assets or liabilities in a transaction that is not a business combination. In addition, deferred tax is not recognized for taxable temporary differences arising on the initial recognition of goodwill. Deferred tax is measured at the tax rates that are expected to be applied to temporary differences when they reverse, based on the laws that have been enacted or substantively enacted at the reporting date. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in profit or loss in the period that includes the date of enactment or substantive enactment. Deferred tax assets and liabilities are offset if there is a legally enforceable right to offset and they relate to taxes levied by the same tax authority on the same taxable entity, or on different tax entities that are expected to settle current tax liabilities and assets on a net basis or their tax assets and liabilities will be realized simultaneously. A deferred tax asset is recognized to the extent that it is probable that future taxable profits will be available against which the temporary difference can be utilized. Deferred tax assets are reviewed at each reporting date and are reduced to the extent that it is no longer probable that the related tax benefit will be realized. The Corporation is subject to taxation in numerous jurisdictions. Uncertainties exist with respect to the interpretation of complex tax regulations and requires significant judgement. Differences arising between the actual results and the assumptions made, or future changes to such assumptions, could necessitate future adjustments to taxable income and expense already recorded. The Corporation establishes provisions, based on reasonable estimates, for possible consequences of audits by the tax authorities of the respective countries in which it operates. The amount of such provisions is based on various factors, such as experience of previous tax audits and differing interpretations of tax regulations by the taxable entity and the responsible tax authority.
Revenue from Contracts with Customers	(j) Revenue from Contracts with Customers Precision recognizes revenue from a variety of sources. In general, customer invoices are issued upon rendering all performance obligations for an individual well-site job. Under the Corporation’s standard contract terms, customer payments are to be received within 30 days of the customer’s receipt of an invoice. Contract Drilling Services The Corporation contracts individual drilling rig packages, including crews and support equipment, to its customers. Depending on the customer’s drilling program, contracts may be for a single well, multiple wells or a fixed term. Revenue from contract drilling services is recognized over time from spud to rig release on a daily basis. Operating days are measured through industry standard tour sheets that document the daily activity of the rig. Revenue is recognized at the applicable day rate for each well, based on rates specified in the drilling contract. The Corporation provides services under turnkey contracts, whereby Precision is required to drill a well to an agreed upon depth under specified conditions for a fixed price, regardless of the time required or problems encountered in drilling the well. Revenue from turnkey drilling contracts is recognized over time using the input method based on costs incurred to date in relation to estimated total contract costs, as that most accurately depicts the Corporation’s performance. The Corporation also provides directional drilling services, which include the provision of directional drilling equipment, tools and personnel to the wellsite, and performance of daily directional drilling services. Directional drilling revenue is recognized over time, upon the daily completion of operating activities. Operating days are measured through daily tour sheets. Revenue is recognized at the applicable day rate, as stipulated in the directional drilling contract. Completion and Production Services The Corporation provides a variety of well completion and production services including well servicing and snubbing. In general, service rigs do not involve long-term contracts or penalties for termination. Revenue is recognized daily upon completion of services. Operating days are measured through daily tour sheets and field tickets. Revenue is recognized at the applicable daily or hourly rate, as stipulated in the contract. The Corporation offers a variety of oilfield equipment for rental to its customers. Rental revenue is recognized daily at the applicable rate stated in the rental contract. Rental days are measured through field tickets. The Corporation provides accommodation and catering services to customers in remote locations. Customers contract these services either as a package or individually for a fixed term. For accommodation services, the Corporation supplies camp equipment and revenue is recognized over time on a daily basis, once the equipment is on-site and available for use, at the applicable rate stated in the contract. For catering services, the Corporation recognizes revenue daily according to meals served. Accommodation and catering services provided are measured through field tickets.
Employee Benefit Plans	(k) Employee Benefit Plans Precision sponsors various defined contribution retirement plans for its employees. The Corporation’s contributions to defined contribution plans are expensed as employees earn the entitlement.
Provisions	(l) Provisions Provisions are recognized when the Corporation has a present obligation as a result of a past event, when it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation, and when a reliable estimate can be made of the amount of the obligation. The amount recognized as a provision is the best estimate of the consideration required to settle the present obligation at the end of the reporting period, taking into account the risks and uncertainties surrounding the obligation. Where a provision is measured using the cash flows estimated to settle the present obligation, its carrying amount is the present value of those cash flows.
Share Based Incentive Compensation Plans	(m) Share Based Incentive Compensation Plans The Corporation has established several cash-settled share based incentive compensation plans for non-management directors, officers, and other eligible employees. The estimated fair value of amounts payable to eligible participants under these plans are recognized as an expense with a corresponding increase in liabilities over the period that the participants become unconditionally entitled to payment. The recorded liability is re-measured at the end of each reporting period until settlement with the resultant change to the fair value of the liability recognized in profit or loss for the period. When the plans are settled, the cash paid reduces the outstanding liability. The Corporation has an employee share purchase plan that allows eligible employees to purchase common shares through payroll deductions. Under this plan, contributions made by employees are matched to a specific percentage by the Corporation. The contributions made by the Corporation are expensed as incurred. Prior to January 1, 2012, the Corporation had an equity-settled deferred share unit plan whereby non-management directors of Precision could elect to receive all or a portion of their compensation in fully-vested deferred share units. Compensation expense was recognized based on the fair value price of the Corporation’s shares at the date of grant with a corresponding increase to contributed surplus. Upon redemption of the deferred share units into common shares, the amount previously recognized in contributed surplus is recorded as an increase to shareholders’ capital. The Corporation continues to have obligations under this plan. The Corporation has a share option plan for certain eligible employees. Under this plan, the fair value of share purchase options is calculated at the date of grant using the Black-Scholes option pricing model, and that value is recorded as compensation expense over the grant’s vesting period with an offsetting credit to contributed surplus. A forfeiture rate is estimated on the grant date and is adjusted to reflect the actual number of options that vest. Upon exercise of the equity purchase option, the associated amount is reclassified from contributed surplus to shareholders’ capital. Consideration paid by employees upon exercise of the equity purchase options is credited to shareholders’ capital.
Foreign Currency Translation	(n) Foreign Currency Translation Transactions of the Corporation’s individual entities are recorded in the currency of the primary economic environment in which it operates (its functional currency). Transactions in currencies other than the entities’ functional currency are translated at rates in effect at the time of the transaction. At each period end, monetary assets and liabilities are translated at the prevailing period-end rates. Non-monetary items that are measured in terms of historical cost in a foreign currency are not retranslated. Gains and losses are included in profit or loss except for gains and losses on translation of long-term debt designated as a hedge of foreign operations, which are deferred and included in other comprehensive income. For the purpose of preparing the Corporation’s consolidated financial statements, the financial statements of each foreign operation that does not have a Canadian dollar functional currency are translated into Canadian dollars. Assets and liabilities are translated at exchange rates in effect at the period end date. Revenues and expenses are translated using average exchange rates for the month of the respective transaction. Gains or losses resulting from these translation adjustments are recognized initially in other comprehensive income and reclassified from equity to profit or loss on disposal or partial disposal of the foreign operation.
Per Share Amounts	(o) Per Share Amounts Basic per share amounts are calculated using the weighted average number of shares outstanding during the period. Diluted per share amounts are calculated by using the treasury stock method for equity-based compensation arrangements. The treasury stock method assumes that any proceeds obtained on exercise of equity-based compensation arrangements would be used to purchase common shares at the average market price during the period. The weighted average number of shares outstanding is then adjusted by the difference between the number of shares issued from the exercise of equity-based compensation arrangements and shares repurchased from the related proceeds.
Financial Instruments	(p) Financial Instruments i) Non-Derivative Financial Instruments: Financial assets and liabilities are classified and measured at amortized cost, fair value through other comprehensive income or fair value through profit and loss. The classification of financial assets and liabilities is generally based on the business model in which the asset or liability is managed and its contractual cash flow characteristics. Financial assets held within a business model whose objective is to collect contractual cash flows and whose contractual terms give rise to cash flows on specified dates that are solely payments of principal and interest on the principal amount outstanding are measured at amortized cost. After their initial fair value measurement, accounts receivable, accounts payable and accrued liabilities and long-term debt are classified and measured at amortized cost using the effective interest rate method. Upon initial recognition of a non-derivative financial asset a loss allowance is recorded for expected credit losses (ECL). Loss allowances for trade receivables are measured based on lifetime ECL that incorporates historical loss information and is adjusted for current economic and credit conditions. ii) Derivative Financial Instruments: The Corporation may enter into certain financial derivative contracts in order to manage the exposure to market risks from fluctuations in interest rates or exchange rates. These instruments are not used for trading or speculative purposes. Precision has not designated its financial derivative contracts as effective accounting hedges, and thus has not applied hedge accounting, even though it considers certain financial contracts to be economic hedges. As a result, financial derivative contracts are classified as fair value through profit or loss and are recorded on the statement of financial position at estimated fair value. Transaction costs are recognized in profit or loss when incurred. Derivatives embedded in financial assets are never separated. Rather, the financial instrument as a whole is assessed for classification. Derivatives embedded in financial liabilities are separated from the host contract and accounted for separately when their economic characteristics and risks are not closely related to the host contract. Embedded derivatives in financial liabilities are recorded on the statement of financial position at estimated fair value and changes in the fair value are recognized in earnings.
Hedge Accounting	(q) Hedge Accounting The Corporation utilizes foreign currency long-term debt to hedge its exposure to changes in the carrying values of the Corporation’s net investment in certain foreign operations from fluctuations in foreign exchange rates. To be accounted for as a hedge, the foreign currency long-term debt must be designated and documented as a hedge and must be effective at inception and on an ongoing basis. The documentation defines the relationship between the foreign currency long-term debt and the net investment in the foreign operations, as well as the Corporation’s risk management objective and strategy for undertaking the hedging transaction. The Corporation formally assesses, both at inception and on an ongoing basis, whether the changes in fair value of the foreign currency long-term debt is highly effective in offsetting changes in fair value of the net investment in the foreign operations. The portion of gains or losses on the hedging item determined to be an effective hedge is recognized in other comprehensive income, net of tax, and is limited to the translation gain or loss on the net investment, while ineffective portions are recorded through profit or loss. A reduction in the fair value of the net investment in the foreign operations or increase in the foreign currency long-term debt balance may result in a portion of the hedge becoming ineffective. If the hedging relationship ceases to be effective or is terminated, hedge accounting is not applied to subsequent gains or losses. The amounts recognized in other comprehensive income are reclassified to profit and loss and the corresponding exchange gains or losses arising from the translation of the foreign operation are recorded through profit and loss upon dissolution or substantial dissolution of the foreign operation.
Assets Held For Sale	(r) Assets Held For Sale Non-current assets, or disposal groups, are classified as held-for sale if it is highly probable that their carrying amount will be recovered primarily through a sale transaction rather than through continued use. Such assets, or disposal groups, are measured at the lower of their carrying amount and fair value less costs to sell. Impairment losses on initial classification as held-for-sale and subsequent gains or losses on remeasurement are recognized in profit or loss.
Leases	(s) Leases At inception, Precision assesses whether its contracts contain a lease. A contract contains a lease if it conveys the right to control the use of an identified asset for a period of time in exchange for consideration. The assessment of whether a contract conveys the right to control the use of an identified asset considers whether: • the contract involves the use of an identified asset and the substantive substitution rights of the supplier. If the supplier has a substantive substitution right, then the asset is not identified; • the lessee’s right to obtain substantially all of the economic benefits from the use of the asset; and • the lessee’s right to direct the use of the asset, including decision-making to change how and for what purpose the asset is used. At inception or on reassessment of a contract that contains a lease component, Precision allocates the consideration in the contract to each lease component on the basis of their relative stand-alone prices. Leases in which Precision is a lessee Precision recognizes a right of use asset and corresponding lease obligation at the lease commencement date. The right of use asset is initially measured at cost, which comprises the initial amount of the lease obligation adjusted for lease payments made on or before commencement date, incurred initial direct costs, estimated site retirement costs and any lease incentives received. The right of use asset is subsequently depreciated using the straight-line method from the commencement date to the earlier of the end of the useful life of the right of use asset or the end of the lease term. The estimated useful lives of right of use assets are consistent with those of property, plant and equipment. In addition, the right of use asset is reduced by impairment losses, if any, and adjusted for certain remeasurements of the lease obligation. The lease obligation is initially measured at the present value of the minimum lease payments not paid at commencement date, discounted using the interest rate implicit in the lease or, if that rate cannot be readily determined, Precision’s incremental borrowing rate. Generally, Precision uses its incremental borrowing rate as the discount rate for those leases in which it is the lessee. Lease payments included in the measurement of the lease obligation comprise the following: • fixed payments, including in-substance fixed payments; • variable lease payments that depend on an index or a rate, initially measured using the index or rate as at the commencement date; • amounts expected to be payable under a residual value guarantee; and • the exercise price under a purchase option that Precision is reasonably certain to exercise, lease payments in an optional renewal period if Precision is reasonably certain to exercise an extension option, and penalties for early termination of a lease unless Precision is reasonably certain not to terminate early. The lease obligation is measured at amortized cost using the effective interest method. The measurement of lease obligations require the use of certain estimates and assumptions including discount rates, exercise of lease term extension options, and escalating lease rates. It is remeasured when there is a change in: • future lease payments arising from a change in an index or rate; • the estimated amount expected to be payable under a residual value guarantee; or • the assessment of whether Precision will exercise a purchase, extension or termination option. When the lease obligation is remeasured in this way, a corresponding adjustment is made to the carrying amount of the right of use asset, or is recorded in profit or loss if the carrying amount of the right of use asset has been reduced to zero. Leases in which Precision is a lessor When Precision acts as a lessor, at inception, Precision evaluates the classification as either a finance or operating lease. To classify each lease, Precision makes an overall assessment of whether the lease transfers substantially all of the risks and rewards incidental to ownership of the underlying asset. If this is the case, then the lease is a finance lease; if not, then it is an operating lease. When acting as a sub-lessor, Precision accounts for its interests in the head lease and the sub-lease separately. It assesses the lease classification of a sub-lease with reference to the right of use asset arising from the head lease, not with reference to the underlying asset. If a head lease is a short-term lease then Precision classifies the sub-lease as an operating lease. If an arrangement contains lease and non-lease components, Precision applies IFRS 15 to allocate the consideration in the contract. Precision recognizes lease payments received under operating leases for drilling rigs as income on a systematic basis, drilling days, over the lease term as part of revenue. The accounting policies applicable to Precision as a lessor in the comparative period were not different from IFRS 16. However, when Precision was an intermediate lessor the sub-leases were classified with reference to the underlying asset.
Critical Accounting Assumptions and Estimates	(t) Critical Accounting Assumptions and Estimates i) Impairment of Long-Lived Assets At each reporting date, the Corporation reviews the carrying amount of assets in each CGU to determine whether an indicator of impairment exists. The Corporation’s analysis is based on relevant internal and external factors that indicate a CGU may be impaired such as the obsolescence or planned disposal of significant assets, financial performance of the CGU compared to forecasts and consideration of the Corporation’s market capitalization. When indications of impairment exist within a CGU, a recoverable amount is determined and requires assumptions to estimate future discounted cash flows. These estimates and assumptions include future drilling activity, margins and market conditions over the long-term life of the CGU. In selecting a discount rate, the Corporation uses observable market data inputs to develop a rate that the Corporation believes approximates the discount rate of market participants. Although the Corporation believes the assumptions and estimates are reasonable and consistent with current conditions, internal planning, and expected future operations, such assumptions and estimations are subject to significant uncertainty and judgment. ii) Income Taxes Significant estimation and assumptions are required in determining the provision for income taxes. The recognition of deferred tax assets in respect of deductible temporary differences and unused tax losses and credits is based on the Corporation’s estimation of future taxable profit against which these differences, losses and credits may be used. The assessment is based upon existing tax laws and estimates of the Corporation’s future taxable income. These estimates may be materially different from the actual final tax return in future periods.
Accounting Standards Adopted January 1, 2019	(u) Accounting Standards Adopted January 1, 2019 i) IFRS 16, Leases IFRS 16 introduced a single, on-balance sheet lease accounting model for lessees and requires a lessee to recognize a right of use asset representing its right to direct the use of the underlying asset as well as a lease obligation representing the Corporation’s obligation to make future lease payments. Lessor accounting remained similar to the prior lease standard in which lessors classify leases as either finance or operating leases. On January 1, 2019, Precision adopted IFRS 16 using the modified retrospective approach. Under this approach, comparative information has not been restated and continues to be reported under IAS 17 and related interpretations. Transition Precision adopted IFRS 16 on January 1, 2019 using the modified retrospective method of adoption. When applying the modified retrospective approach to leases previously classified as operating leases under IAS 17 and related interpretations, the lessee can elect, on a lease-by-lease basis, whether to apply a number of practical expedients on transition. On initial adoption of the new standard, Precision elected to use the following practical expedients, where applicable, to: • grandfather the assessment of which contracts contained leases under IFRS 16 to only those previously identified as leases under IAS 17 and related interpretations; • not apply the requirements of the standard to short-term and low-value leases; • treat existing operating leases with a remaining term of less than 12 months at January 1, 2019 as short-term leases; and • apply a single discount rate to a portfolio of leases with reasonably similar characteristics. In addition, at the date of initial application, for those leases previously classified as an operating lease under IAS 17, Management elected to recognize and measure the respective right of use assets at the amount equal to the lease obligation, adjusted for any prepaid or accrued lease payment immediately before the date of initial application. The opening balance sheet adjustment in relation to these leases was: January 1, 2019 Right of use asset $ 73,464 Accounts payable and accrued liabilities (2,800 ) Lease obligation (73,464 ) Deficit 2,800 When measuring certain lease obligations at the date of transition, minimum lease payments were discounted using Precision’s incremental borrowing rate. The weighted average incremental borrowing rates applied was 6.1%. At the date of transition, Precision derecognized $3 million of its deferred base rent balance which was established to straight-line amortize escalating corporate office rent expenses over the term of the lease. January 1, 2019 Operating lease commitment at December 31, 2018 $ 67,392 Discounted using the incremental borrowing rate at January 1, 2019 54,517 Extension options reasonably certain to be exercised 18,947 Lease obligation $ 73,464 In the comparative period, Precision classified its leases that transferred substantially all the risks and rewards of ownership as finance leases. These leased assets were measured initially at an amount equal to the lower of their fair value and the present value of the minimum lease payments, excluding any contingent payments. Subsequently, these assets were accounted for in accordance with the applicable accounting policy respective to that asset. Assets held under other leases were classified as operating leases and were not recognized on the consolidated statement of financial position. Payments made under operating leases were recognized in profit or loss on a straight-line basis over the term of the lease. Lease incentives received were recognized as an integral part of the total lease expense, over the term of the lease. ii) IFRIC 23, Uncertainty over Income Tax Treatments IFRIC 23 clarifies the accounting for uncertainties in income taxes. The interpretation requires the entity to use the most likely amount or the expected value of the income tax treatment if it concludes that it is not probable that a particular income tax treatment will be accepted. It requires an entity to assume that a taxation authority with the right to examine any amounts reported to it will examine those amounts and will have full knowledge of all relevant information when doing so. Using the modified retrospective method of adoption, Precision initially applied IFRIC 23 on January 1, 2019 and it did not have a material impact on the consolidated financial statements.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Significant Accounting Policies [Abstract]
Schedule of Property, Plant and Equipment Depreciation	Property, plant, and equipment are depreciated as follows: Expected Life Salvage Value Basis of Depreciation Drilling rig equipment: – Power & Tubulars 5 years – straight-line – Dynamic 10 years – straight-line – Structural 20 years 10% straight-line Service rig equipment 20 years 10% straight-line Drilling rig spare equipment up to 15 years – straight-line Service rig spare equipment up to 15 years – straight-line Rental equipment up to 15 years 0 to 25% straight-line Other equipment 3 to 10 years – straight-line Light duty vehicles 4 years – straight-line Heavy duty vehicles 7 to 10 years – straight-line Buildings 10 to 20 years – straight-line
Disclosure of Deferred Base Rent Balance Under Straight-line Amortize Over Lease Term	In addition, at the date of initial application, for those leases previously classified as an operating lease under IAS 17, Management elected to recognize and measure the respective right of use assets at the amount equal to the lease obligation, adjusted for any prepaid or accrued lease payment immediately before the date of initial application. The opening balance sheet adjustment in relation to these leases was: January 1, 2019 Right of use asset $ 73,464 Accounts payable and accrued liabilities (2,800 ) Lease obligation (73,464 ) Deficit 2,800
Summary Of Straight-line Amortize Expenses Over Term Of Lease	When measuring certain lease obligations at the date of transition, minimum lease payments were discounted using Precision’s incremental borrowing rate. The weighted average incremental borrowing rates applied was 6.1%. At the date of transition, Precision derecognized $3 million of its deferred base rent balance which was established to straight-line amortize escalating corporate office rent expenses over the term of the lease. January 1, 2019 Operating lease commitment at December 31, 2018 $ 67,392 Discounted using the incremental borrowing rate at January 1, 2019 54,517 Extension options reasonably certain to be exercised 18,947 Lease obligation $ 73,464

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Revenue Explanatory [Abstract]
Summary of Reconciliation of Disaggregated Revenue by Reportable Segment	The following table includes a reconciliation of disaggregated revenue by reportable segment (Note 5). Revenue has been disaggregated by primary geographical market and type of service provided. Twelve months ended December 31, 2019 Contract Drilling Services Completion and Production Services Corporate and Other Inter- Segment Eliminations Total Canada $ 336,483 $ 128,202 $ — $ (5,308 ) $ 459,377 United States 852,293 19,627 — (269 ) 871,651 International 210,292 — — — 210,292 $ 1,399,068 $ 147,829 $ — $ (5,577 ) $ 1,541,320 Day rate/hourly services $ 1,333,114 $ 147,829 $ — $ (905 ) $ 1,480,038 Shortfall payments/idle but contracted 9,789 — — — 9,789 Turnkey drilling services 3,754 — — — 3,754 Directional services 41,876 — — — 41,876 Other 10,535 — — (4,672 ) 5,863 $ 1,399,068 $ 147,829 $ — $ (5,577 ) $ 1,541,320 Twelve months ended December 31, 2018 Contract Drilling Services Completion and Production Services Corporate and Other Inter- Segment Eliminations Total Canada $ 426,475 $ 138,030 $ — $ (5,759 ) $ 558,746 United States 778,886 12,730 — (304 ) 791,312 International 191,131 — — — 191,131 $ 1,396,492 $ 150,760 $ — $ (6,063 ) $ 1,541,189 Day rate/hourly services $ 1,302,575 $ 150,760 $ — $ (1,009 ) $ 1,452,326 Shortfall payments/idle but contracted 12,520 — — — 12,520 Turnkey drilling services 37,811 — — — 37,811 Directional services 31,943 — — — 31,943 Other 11,643 — — (5,054 ) 6,589 $ 1,396,492 $ 150,760 $ — $ (6,063 ) $ 1,541,189

Segmented Information (Tables)

Segmented Information (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Operating Segments [Abstract]
Summary of Operating Segments	The Corporation operates primarily in Canada, the United States and certain international locations, in two industry segments; Contract Drilling Services and Completion and Production Services. Contract Drilling Services includes drilling rigs, directional drilling, procurement and distribution of oilfield supplies, and the manufacture, sale and repair of drilling equipment. Completion and Production Services includes service rigs, oilfield equipment rental, and camp and catering services. 2019 Contract Drilling Services Completion and Production Services Corporate and Other Inter- Segment Eliminations Total Revenue $ 1,399,068 $ 147,829 $ — $ (5,577 ) $ 1,541,320 Operating earnings (loss) 160,997 10,041 (76,461 ) — 94,577 Depreciation and amortization 300,882 17,881 14,853 — 333,616 Gain on asset disposals (46,849 ) (3,767 ) (125 ) — (50,741 ) Loss on asset decommissioning 20,263 — — — 20,263 Reversal of impairment of property, plant and equipment (5,810 ) — — — (5,810 ) Total assets 2,963,260 152,611 153,969 — 3,269,840 Capital expenditures 154,066 5,448 1,180 — 160,694 2018 Contract Drilling Services Completion and Production Services Corporate and Other Inter- Segment Eliminations Total Revenue $ 1,396,492 $ 150,760 $ — $ (6,063 ) $ 1,541,189 Operating loss (129,965 ) (8,998 ) (59,110 ) — (198,073 ) Depreciation and amortization 341,712 22,801 12,531 — 377,044 Loss (gain) on asset disposals (7,157 ) 1,078 (5,305 ) — (11,384 ) Impairment of goodwill 207,544 — — — 207,544 Total assets 3,301,457 170,113 164,473 — 3,636,043 Capital expenditures 108,610 5,004 12,529 — 126,143
Summary of Operating Earnings (Loss) to Loss Before Income Taxes	A reconciliation of operating earnings (loss) to loss before income taxes is as follows: 2019 2018 Operating earnings (loss) $ 94,577 $ (198,073 ) Add (deduct): Foreign exchange (8,722 ) 4,017 Finance charges 118,453 127,178 Gain on redemption and repurchase of unsecured senior notes (6,815 ) (5,672 ) Loss before income taxes $ (8,339 ) $ (323,596 )
Summary of Operating Segments by Geographic Locations	The Corporation’s operations are carried on in the following geographic locations: 2019 United States Canada International Total Revenue $ 871,651 $ 459,377 $ 210,292 $ 1,541,320 Total assets 1,560,523 1,133,591 575,726 3,269,840 2018 United States Canada International Total Revenue $ 791,312 $ 558,746 $ 191,131 $ 1,541,189 Total assets 1,772,850 1,269,542 593,651 3,636,043

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Property Plant And Equipment [Abstract]
Schedule of Property, Plant and Equipment	2019 2018 Cost $ 6,670,979 $ 6,937,062 Accumulated depreciation (3,921,516 ) (3,898,450 ) $ 2,749,463 $ 3,038,612 Rig equipment 2,510,505 2,745,172 Rental equipment 34,437 43,992 Other equipment 38,604 52,195 Vehicles 7,796 12,702 Buildings 56,834 65,561 Assets under construction 67,740 84,561 Land 33,547 34,429 $ 2,749,463 $ 3,038,612 Cost Rig Equipment Rental Equipment Other Equipment Vehicles Buildings Assets Under Construction Land Total Balance, December 31, 2017 $ 6,034,166 $ 148,011 $ 244,950 $ 43,201 $ 127,385 $ 102,035 $ 33,886 $ 6,733,634 Additions 7,013 — 347 — 569 106,647 — 114,576 Disposals (32,153 ) (18,227 ) (59,865 ) (228 ) (3,663 ) — (893 ) (115,029 ) Reclassifications 127,668 — 507 — — (128,175 ) — — Reclassification to assets held for sale (135,398 ) — — — — — — (135,398 ) Effect of foreign currency exchange differences 321,240 679 5,351 2,483 4,036 4,054 1,436 339,279 Balance, December 31, 2018 6,322,536 130,463 191,290 45,456 128,327 84,561 34,429 6,937,062 Additions 18,436 — 976 224 415 139,835 — 159,886 Disposals (69,945 ) (19,982 ) (4,708 ) (6,014 ) (58 ) — — (100,707 ) Reclassifications 150,674 — 1,197 — — (151,871 ) — — Asset decommissioning (4,364 ) — — — — — — (4,364 ) Effect of foreign currency exchange differences (307,954 ) (174 ) (3,436 ) (1,160 ) (2,507 ) (4,785 ) (882 ) (320,898 ) Balance, December 31, 2019 $ 6,109,383 $ 110,307 $ 185,319 $ 38,506 $ 126,177 $ 67,740 $ 33,547 $ 6,670,979 Accumulated Depreciation Rig Equipment Rental Equipment Other Equipment Vehicles Buildings Assets Under Construction Land Total Balance, December 31, 2017 $ 3,210,384 $ 87,832 $ 178,390 $ 26,921 $ 56,283 $ — $ — $ 3,559,810 Depreciation expense 335,215 9,418 15,993 4,820 8,126 — — 373,572 Disposals (28,399 ) (11,249 ) (59,857 ) (220 ) (3,161 ) — — (102,886 ) Reclassification to assets held for sale (115,740 ) — — — — — — (115,740 ) Effect of foreign currency exchange differences 175,904 470 4,569 1,233 1,518 — — 183,694 Balance, December 31, 2018 3,577,364 86,471 139,095 32,754 62,766 — — 3,898,450 Depreciation expense 289,056 7,473 13,023 3,521 7,663 — — 320,736 Disposals (33,929 ) (17,933 ) (3,274 ) (4,768 ) (58 ) — — (59,962 ) Asset decommissioning (3,518 ) — — — — — — (3,518 ) Reversal of impairment of property, plant and equipment (5,810 ) — — — — — — (5,810 ) Effect of foreign currency exchange differences (224,285 ) (141 ) (2,129 ) (797 ) (1,028 ) — — (228,380 ) Balance, December 31, 2019 $ 3,598,878 $ 75,870 $ 146,715 $ 30,710 $ 69,343 $ — $ — $ 3,921,516

Intangibles (Tables)

Intangibles (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Intangible Assets [Abstract]
Schedule of Intangibles	2019 2018 Cost $ 53,416 $ 51,912 Accumulated amortization (21,670 ) (16,511 ) $ 31,746 $ 35,401 Loan commitment fees related to Senior Credit Facility $ 2,272 $ 2,307 Software 29,474 33,094 $ 31,746 $ 35,401 Cost Loan Commitment Fees Software Total Balance, December 31, 2017 $ 14,138 $ 25,569 $ 39,707 Additions 638 11,567 12,205 Balance, December 31, 2018 14,776 37,136 51,912 Additions 702 808 1,510 Effect of foreign currency exchange differences — (6 ) (6 ) Balance, December 31, 2019 $ 15,478 $ 37,938 $ 53,416 Accumulated Amortization Loan Commitment Fees Software Total Balance, December 31, 2017 $ 11,018 $ 573 $ 11,591 Amortization expense 1,451 3,469 4,920 Balance, December 31, 2018 12,469 4,042 16,511 Amortization expense 737 4,422 5,159 Balance, December 31, 2019 $ 13,206 $ 8,464 $ 21,670

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Goodwill [Abstract]
Summary of Goodwill	Balance, December 31, 2017 $ 205,167 Impairment charge (207,544 ) Exchange adjustment 2,377 Balance, December 31, 2018 and 2019 $ —

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Long Term Debt [Abstract]
Long-Term Debt	LONG-TERM DEBT 2019 2018 2019 2018 Senior Credit Facility US $ — US $ — $ — $ — Unsecured Senior Notes: 6.5% senior notes due 2021 90,625 165,625 117,678 226,113 7.75% senior notes due 2023 344,845 350,000 447,792 477,823 5.25% senior notes due 2024 307,690 351,104 399,545 479,331 7.125% senior notes due 2026 369,735 400,000 480,112 546,084 US $ 1,112,895 US $ 1,266,729 1,445,127 1,729,351 Less net unamortized debt issue costs (17,946 ) (23,098 ) $ 1,427,181 $ 1,706,253 Senior Credit Facility Unsecured Senior Notes Debt Issue Costs Total Balance December 31, 2017 $ — $ 1,758,519 $ (28,082 ) $ 1,730,437 Changes from financing cash flows: Redemption / repurchase of senior notes — (168,722 ) — (168,722 ) Non-cash changes: Gain on redemption / repurchase of unsecured senior notes — (5,672 ) — (5,672 ) Amortization of debt issue costs — — 4,984 4,984 Foreign exchange adjustment — 145,226 — 145,226 Balance December 31, 2018 — 1,729,351 (23,098 ) 1,706,253 Changes from financing cash flows: Redemption / repurchase of senior notes — (198,387 ) — (198,387 ) Non-cash changes: Gain on redemption / repurchase of unsecured senior notes — (6,815 ) — (6,815 ) Amortization of debt issue costs — — 5,152 5,152 Foreign exchange adjustment — (79,022 ) — (79,022 ) Balance December 31, 2019 $ — $ 1,445,127 $ (17,946 ) $ 1,427,181
Long-Term Debt Obligations	Long-term debt obligations at December 31, 2019 will mature as follows: 2020 $ — 2021 117,678 2022 — 2023 447,792 Thereafter 879,657 $ 1,445,127
Schedule of Listing of Currently Applicable Restrictive and Financial Covenants	Following is a listing of the currently applicable restrictive and financial covenants as at December 31, 2019: Covenant At December 31, 2019 Senior Credit Facility Consolidated senior debt to consolidated covenant EBITDA (1) ≤ 2.50 0.00 Consolidated covenant EBITDA to consolidated interest expense ≥ 2.50 3.39 Unsecured Senior Notes Consolidated interest coverage ratio ≥ 2.00 3.30 (1) For purposes of calculating the leverage ratio consolidated senior debt only includes secured indebtedness.

Finance Charges (Tables)

Finance Charges (Tables)	12 Months Ended
	Dec. 31, 2019
Finance Costs [Abstract]
Summary of Finance Charges	2019 2018 Interest: Long-term debt $ 110,730 $ 121,810 Lease obligation 3,389 — Other 21 378 Income (1,576 ) (1,444 ) Amortization of debt issue costs 5,889 6,434 Finance charges $ 118,453 $ 127,178

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Leases [Abstract]
Summary of Right-of-Use-Assets	Precision recognizes right of use assets primarily from its leases of real estate and vehicles and equipment. Real Estate Vehicles and Equipment Total Balance, January 1, 2019 $ — $ — $ — Transition adjustments 58,635 14,829 73,464 Additions — 1,947 1,947 Derecognition (29 ) — (29 ) Depreciation (4,055 ) (4,403 ) (8,458 ) Lease remeasurements 163 — 163 Effect of foreign currency exchange differences (688 ) (257 ) (945 ) Balance, December 31, 2019 $ 54,026 $ 12,116 $ 66,142
Expected Non-cancellable Operating Lease Payments	Expected non-cancellable operating lease payments are as follows: 2019 2018 Less than one year $ 11,954 $ 13,496 One to five years 33,566 36,639 More than five years 11,117 17,797 $ 56,637 $ 67,932
Summary of Maturity Analysis of Lease Payments	The following table sets out a maturity analysis of lease payments, showing the undiscounted lease payments to be received after December 31, 2019. Less than one year $ 297,425 One to five years 207,746 More than five years 12,437 $ 517,608

Share Based Compensation Plans

Share Based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Disclosure of Liability Classified Plans	Liability Classified Plans Restricted Share Units Performance Share Units Non- Management Directors’ DSUs Total Balance, December 31, 2017 $ 6,950 $ 11,407 $ 3,512 $ 21,869 Expensed during the period 5,223 398 769 6,390 Payments (6,764 ) (7,284 ) (1,800 ) (15,848 ) Balance, December 31, 2018 5,409 4,521 2,481 12,411 Expensed during the period 5,755 1,583 855 8,193 Payments (3,846 ) (3,246 ) — (7,092 ) Balance, December 31, 2019 $ 7,318 $ 2,858 $ 3,336 $ 13,512 Current $ 3,956 $ 726 $ — $ 4,682 Long-term 3,362 2,132 3,336 8,830 $ 7,318 $ 2,858 $ 3,336 $ 13,512
Summary of Shares Outstanding Under Share Based Incentive Plans	A summary of the RSUs and PSUs outstanding under these share based incentive plans is presented below: RSUs Outstanding PSUs Outstanding December 31, 2017 2,796,858 5,726,259 Granted 2,918,912 1,292,550 Redeemed (1,404,284 ) (2,137,163 ) Forfeited (255,572 ) (338,656 ) December 31, 2018 4,055,914 4,542,990 Granted 4,187,350 2,038,900 Redeemed (1,505,683 ) (1,322,758 ) Forfeited (399,518 ) (1,923,782 ) December 31, 2019 6,338,063 3,335,350
Summary of Status of Equity Incentive Plan	A summary of the status of the equity incentive plan is presented below: Canadian Share Options Options Outstanding Range of Exercise Prices Weighted Average Exercise Price Options Exercisable December 31, 2017 4,900,360 $ 4.46 – 14.50 $ 8.50 3,734,019 Granted 490,200 4.35 – 4.35 4.35 Forfeited (657,404 ) 10.44 – 14.50 10.58 December 31, 2018 4,733,156 4.35 – 14.31 7.78 3,786,473 Forfeited (711,572 ) 7.15 – 10.67 10.51 December 31, 2019 4,021,584 $ 4.35 – 14.31 $ 7.29 3,569,069 U.S. Share Options Options Outstanding Range of Exercise Prices (US$) Weighted Average Exercise Price (US$) Options Exercisable December 31, 2017 5,558,621 $ 3.21 – 15.21 $ 6.16 2,891,808 Granted 1,569,250 3.44 – 3.62 3.45 Exercised (66,000 ) 3.21 – 3.21 3.21 Forfeited (996,021 ) 3.21 – 15.21 8.08 December 31, 2018 6,065,850 3.21 – 10.74 5.17 3,224,078 Granted 599,300 2.56 – 2.56 2.56 Forfeited (302,100 ) 7.79 – 10.74 10.68 December 31, 2019 6,363,050 $ 2.56 – 9.18 $ 4.67 4,348,824
Range of Exercise Prices for Options Outstanding	Canadian Share Options Total Options Outstanding Options Exercisable Range of Exercise Prices: Number Weighted Average Exercise Price Weighted Average Remaining Contractual Life (Years) Number Weighted Average Exercise Price $ 4.35 – 6.99 1,105,400 $ 4.41 4.04 778,595 $ 4.44 7.00 – 8.99 1,533,334 7.32 2.59 1,407,624 7.32 9.00 – 14.31 1,382,850 9.57 0.56 1,382,850 9.57 $ 4.35 – 14.31 4,021,584 $ 7.29 2.29 3,569,069 $ 7.56 U.S. Share Options Total Options Outstanding Options Exercisable Range of Exercise Prices (US$): Number Weighted Average Exercise Price (US$) Weighted Average Remaining Contractual Life (Years) Number Weighted Average Exercise Price (US$) $ 2.56 – 3.99 3,646,250 $ 3.21 4.50 2,011,540 $ 3.27 4.00 – 6.99 1,924,500 5.61 3.37 1,544,984 5.62 7.00 – 9.18 792,300 9.08 0.60 792,300 9.08 $ 2.56 – 9.18 6,363,050 $ 4.67 3.67 4,348,824 $ 5.17
Deferred Share Units (DSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Summary of Shares Outstanding Under Share Based Incentive Plans	A summary of the DSUs outstanding under this share based incentive plan is presented below: Deferred Share Units Outstanding Balance December 31, 2017 953,277 Granted 474,766 Redeemed (374,408 ) Balance December 31, 2018 1,053,635 Granted 738,619 Balance December 31, 2019 1,792,254
Deferred Share Units (DSUs) [Member] | Equity-Settled Plans [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Summary of Shares Outstanding Under Share Based Incentive Plans	A summary of this share based incentive plan is presented below: Deferred Share Units Outstanding December 31, 2017 195,743 Redeemed (102,570 ) December 31, 2018 and 2019 93,173
Executive Performance Share Units [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Summary of Shares Outstanding Under Share Based Incentive Plans	. A summary of the activity under this share based incentive plan is presented below: Executive Performance Share Units Outstanding Weighted Fair Value December 31, 2017 1,159,000 $ 6.00 Granted 2,082,800 6.22 Forfeited (50,733 ) 6.12 December 31, 2018 3,191,067 6.14 Granted 4,211,600 4.11 Forfeited (25,767 ) 6.02 December 31, 2019 7,376,900 4.98

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Net Deferred Tax Assets And Liabilities [Abstract]
Schedule of Provision for Income Taxes	A reconciliation of the difference for the years ended December 31, is as follows: 2019 2018 Loss before income taxes $ (8,339 ) $ (323,596 ) Federal and provincial statutory rates 27 % 27 % Tax at statutory rates $ (2,252 ) $ (87,371 ) Adjusted for the effect of: Non-deductible expenses 1,597 49,455 Non-taxable capital gains (1,408 ) (845 ) Impact of foreign tax rates (13,549 ) 4,861 Withholding taxes 1,262 1,061 Taxes related to prior years (1,975 ) 3,803 Other 1,368 (290 ) Income tax recovery $ (14,957 ) $ (29,326 )
Summary of Net Deferred Tax Liability	The net deferred tax liability is comprised of the tax effect of the following temporary differences: 2019 2018 Deferred tax liability: Property, plant and equipment and intangibles $ 426,934 $ 467,109 Debt issue costs 3,280 3,534 Partnership deferrals 850 1,730 Other 7,926 5,722 438,990 478,095 Offsetting of assets and liabilities (413,601 ) (405,316 ) 25,389 72,779 Deferred tax assets: Losses (expire from time to time up to 2038) 402,025 423,595 Long-term incentive plan 6,131 6,849 Other 10,169 11,752 418,325 442,196 Offsetting of assets and liabilities (413,601 ) (405,316 ) 4,724 36,880 Net deferred tax liability $ 20,665 $ 35,899
Summary of Movement in Temporary Differences of Deferred Tax Liabilities	The movement in temporary differences is as follows: Property, Plant and Equipment and Intangibles Partnership Deferrals Other Deferred Tax Liabilities Losses Debt Issue Costs Long-Term Incentive Plan Other Deferred Tax Assets Net Deferred Tax Liability Balance, December 31, 2017 $ 454,613 $ (335 ) $ 6,709 $ (368,133 ) $ 3,352 $ (7,935 ) $ (11,182 ) $ 77,089 Recognized in net loss (9,667 ) 2,065 (1,005 ) (30,660 ) 182 1,325 (139 ) (37,899 ) Effect of foreign currency exchange differences 22,163 — 18 (24,802 ) — (239 ) (431 ) (3,291 ) Balance, December 31, 2018 $ 467,109 $ 1,730 $ 5,722 $ (423,595 ) $ 3,534 $ (6,849 ) $ (11,752 ) $ 35,899 Recognized in net earnings (26,825 ) (880 ) 2,216 7,874 (254 ) 572 1,260 (16,037 ) Effect of foreign currency exchange differences (13,350 ) — (12 ) 13,696 — 146 323 803 Balance, December 31, 2019 $ 426,934 $ 850 $ 7,926 $ (402,025 ) $ 3,280 $ (6,131 ) $ (10,169 ) $ 20,665

Provisions and Other (Tables)

Provisions and Other (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Other Provisions [Abstract]
Disclosure of Provisions and Other	Workers’ Compensation Balance December 31, 2017 $ 13,232 Expensed during the year 3,359 Payment of deductibles and uninsured claims (4,271 ) Effects of foreign currency exchange differences 1,053 Balance December 31, 2018 13,373 Expensed during the year 4,047 Payment of deductibles and uninsured claims (4,915 ) Effects of foreign currency exchange differences (639 ) Balance December 31, 2019 $ 11,866 2019 2018 Current $ 1,907 $ 2,796 Long-term 9,959 10,577 $ 11,866 $ 13,373

Shareholders' Capital (Tables)

Shareholders' Capital (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Classes Of Share Capital [Abstract]
Schedule of Issued Capital	Common shares Number Amount Balance, December 31, 2017 293,238,858 $ 2,319,293 Issued on redemption of non-management directors' DSUs 476,978 2,609 Options exercised – cash consideration 66,000 275 – reclassification from contributed surplus — 103 Balance, December 31, 2018 293,781,836 $ 2,322,280 Share repurchase (16,482,032 ) (25,902 ) Balance, December 31, 2019 277,299,804 $ 2,296,378

Per Share Amounts (Tables)

Per Share Amounts (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Per Share Amounts	The following tables reconcile the net earnings (loss) and weighted average shares outstanding used in computing basic and diluted earnings (loss) per share: 2019 2018 Net earnings (loss) – basic and diluted $ 6,618 $ (294,270 ) (Stated in thousands) 2019 2018 Weighted average shares outstanding – basic 290,782 293,560 Effect of stock options and other equity compensation plans 6,397 — Weighted average shares outstanding – diluted 297,179 293,560

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2019
Text Block1 [Abstract]
Summary of Accumulated Other Comprehensive Income	Unrealized Foreign Currency Translation Gains (Losses) Foreign Exchange Gain (Loss) on Net Investment Hedge Accumulated Other Comprehensive Income December 31, 2017 $ 440,733 $ (309,123 ) $ 131,610 Other comprehensive income 175,630 (145,226 ) 30,404 December 31, 2018 616,363 (454,349 ) 162,014 Other comprehensive loss (106,781 ) 79,022 (27,759 ) December 31, 2019 $ 509,582 $ (375,327 ) $ 134,255

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Compensation of Key Management Personnel	The remuneration of key management personnel is as follows: 2019 2018 Salaries and other benefits $ 8,747 $ 6,732 Equity settled share based compensation 9,047 5,562 Cash settled share based compensation 1,432 722 $ 19,226 $ 13,016

Financial Instruments (Tables)

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Financial Instruments [Abstract]
Summary of Expected Credit Loss Allowance	The movement in the expected credit loss allowance during the year was as follows: 2019 2018 Balance at January 1, $ 1,470 $ 2,596 Impairment loss recognized 72 483 Amounts written-off as uncollectible (537 ) (416 ) Impairment loss reversed (24 ) (1,247 ) Effect of movement in exchange rates (52 ) 54 Balance at December 31, $ 929 $ 1,470
Summary of Ageing of Trade Receivables	The ageing of trade receivables at December 31 was as follows: 2019 2018 Gross Provision for Impairment Gross Provision for Impairment Not past due $ 144,292 $ 1 $ 175,277 $ — Past due 0 – 30 days 47,965 8 64,351 — Past due 31 – 120 days 19,166 28 25,032 71 Past due more than 120 days 1,303 892 1,399 1,399 $ 212,726 $ 929 $ 266,059 $ 1,470
Summary of Financial Instruments were Denominated in U S Dollars	The following financial instruments were denominated in U.S. dollars: 2019 2018 Canadian Operations Foreign Operations Canadian Operations Foreign Operations Cash US $ 9,727 US $ 41,154 US $ 957 US $ 49,302 Accounts receivable 242 150,873 482 181,609 Accounts payable and accrued liabilities (17,730 ) (86,324 ) (20,655 ) (122,417 ) Long-term liabilities, excluding long-term incentive plans (1) — (7,669 ) — (7,747 ) Net foreign currency exposure US $ (7,761 ) US $ 98,034 US $ (19,216 ) US $ 100,747 Impact of $0.01 change in the U.S. dollar to Canadian dollar exchange rate on net earnings (loss) $ (78 ) $ — $ (192 ) $ — Impact of $0.01 change in the U.S. dollar to Canadian dollar exchange rate on comprehensive loss $ — $ 980 $ — $ 1,007 (1) Excludes U.S. dollar long-term debt that has been designated as a hedge of the Corporation’s net investment in certain self-sustaining foreign operations.
Summary of Contractual Maturities of Financial Liabilities and Other Contractual Commitments	The following are the contractual maturities of the Corporation’s financial liabilities and other contractual commitments as at December 31, 2019: 2020 2021 2022 2023 2024 Thereafter Total Accounts payable and accrued liabilities $ 199,478 $ — $ — $ — $ — $ — $ 199,478 Share based compensation 5,130 6,649 6,026 — — — 17,805 Long-term debt (1) 32,463 85,215 — 447,792 399,545 480,112 1,445,127 Interest on long-term debt (2) (3) 95,427 95,196 89,888 88,442 52,562 35,633 457,148 Commitments 36,812 64,098 45,346 6,643 5,195 11,117 169,211 Total $ 369,310 $ 251,158 $ 141,260 $ 542,877 $ 457,302 $ 526,862 $ 2,288,769 (1) At December 31, 2019, Precision committed to redeem US$25 million of its 6.5% unsecured senior notes due 2021 in the first quarter of 2020. (2) Calculated based on December 31, 2019 debt balance less first quarter unsecured senior notes redemptions, interest rates, and foreign exchange rates in effect as at December 31, 2019. (3) Excludes amortization of long-term debt issue costs.

Capital Management (Tables)

Capital Management (Tables)	12 Months Ended
	Dec. 31, 2019
Capital Management [Abstract]
Summary of Capitalisation and Ratio	As at December 31, 2019 and 2018, these ratios were as follows: 2019 2018 Long-term debt $ 1,427,181 $ 1,706,253 Shareholders’ equity 1,527,432 1,557,752 Total capitalization $ 2,954,613 $ 3,264,005 Long-term debt to long-term debt plus equity ratio 0.48 0.52

Supplemental Information (Table

Supplemental Information (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Supplemental Information [Abstract]
Components of Changes in Non-cash Working Capital Balances	Components of changes in non-cash working capital balances are as follows: 2019 2018 Accounts receivable $ 51,152 $ (32,709 ) Inventory 1,157 (7,504 ) Accounts payable and accrued liabilities (61,376 ) 23,225 $ (9,067 ) $ (16,988 ) Pertaining to: Operations $ (4,493 ) $ (17,880 ) Investments (4,574 ) 892
Components of Accounts Receivable	The components of accounts receivable are as follows: 2019 2018 Trade $ 211,797 $ 264,589 Accrued trade 32,167 47,426 Prepaids and other 66,240 60,321 $ 310,204 $ 372,336
Components of Accounts Payable and Accrued Liabilities	The components of accounts payable and accrued liabilities are as follows: 2019 2018 Accounts payable $ 91,468 $ 129,493 Accrued liabilities: Payroll 54,334 73,682 Other 53,676 71,314 $ 199,478 $ 274,489
Summary of Operating and General and Administrative Expenses	The following table presents operating and general and administrative expenses by nature: 2019 2018 Wages, salaries and benefits $ 697,935 $ 728,101 Purchased materials, supplies and services 429,365 422,359 Share based compensation 22,115 15,598 $ 1,149,415 $ 1,166,058 Allocated to: Operating expense $ 1,038,967 $ 1,067,264 General and administrative 104,010 111,830 Restructuring 6,438 1,164 Other recoveries — (14,200 ) $ 1,149,415 $ 1,166,058

Long-Term Debt Guarantor Disc_2

Long-Term Debt Guarantor Disclosure (Tables)	12 Months Ended
	Dec. 31, 2019
Long Term Debt Guarantor Disclosure [Abstract]
Condensed Consolidated Statement of Financial Position	Condensed Consolidated Statement of Financial Position as at December 31, 2019 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Assets Cash $ 20,952 $ 20,651 $ 33,098 $ — $ 74,701 Other current assets 3,952 242,968 96,140 4 343,064 Intercompany receivables 82,101 2,205,834 67,377 (2,355,312 ) — Investments in subsidiaries 4,535,625 30 — (4,535,655 ) — Property, plant and equipment 48,416 2,263,355 437,413 279 2,749,463 Intangibles 30,434 1,312 — — 31,746 Right of use assets 23,070 39,267 3,805 — 66,142 Other long-term assets — — 6,595 (1,871 ) 4,724 Total assets $ 4,744,550 $ 4,773,417 $ 644,428 $ (6,892,555 ) $ 3,269,840 Liabilities and shareholders’ equity Current liabilities $ 33,862 $ 130,232 $ 51,975 $ — $ 216,069 Intercompany payables and debt 2,217,790 84,901 52,621 (2,355,312 ) — Long-term debt 1,427,181 — — — 1,427,181 Lease obligation 20,877 31,614 2,489 — 54,980 Other long-term liabilities 26,927 18,454 668 (1,871 ) 44,178 Total liabilities 3,726,637 265,201 107,753 (2,357,183 ) 1,742,408 Shareholders’ equity 1,017,913 4,508,216 536,675 (4,535,372 ) 1,527,432 Total liabilities and shareholders’ equity $ 4,744,550 $ 4,773,417 $ 644,428 $ (6,892,555 ) $ 3,269,840 Condensed Consolidated Statement of Financial Position as at December 31, 2018 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Assets Cash $ 28,626 $ 37,138 $ 30,862 $ — $ 96,626 Other current assets 4,798 308,450 93,166 3 406,417 Intercompany receivables 51,616 1,887,405 80,735 (2,019,756 ) — Investments in subsidiaries 4,522,964 68 — (4,523,032 ) — Assets held for sale — 19,658 — — 19,658 Property, plant and equipment 55,430 2,541,060 441,509 613 3,038,612 Intangibles 33,548 1,853 — — 35,401 Other long-term assets — 46,620 5,479 (12,770 ) 39,329 Total assets $ 4,696,982 $ 4,842,252 $ 651,751 $ (6,554,942 ) $ 3,636,043 Liabilities and shareholders’ equity Current liabilities $ 42,211 $ 190,239 $ 49,712 $ — $ 282,162 Intercompany payables and debt 1,918,306 60,101 41,349 (2,019,756 ) — Long-term debt 1,706,253 — — — 1,706,253 Other long-term liabilities 88,983 13,160 503 (12,770 ) 89,876 Total liabilities 3,755,753 263,500 91,564 (2,032,526 ) 2,078,291 Shareholders’ equity 941,229 4,578,752 560,187 (4,522,416 ) 1,557,752 Total liabilities and shareholders’ equity $ 4,696,982 $ 4,842,252 $ 651,751 $ (6,554,942 ) $ 3,636,043
Condensed Consolidated Statement of Net Earnings (Loss)	Condensed Consolidated Statement of Net Earnings (Loss) for the year ended December 31, 2019 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Revenue $ 92 $ 1,341,624 $ 210,292 $ (10,688 ) $ 1,541,320 Operating expense 56 909,898 139,701 (10,688 ) 1,038,967 General and administrative 38,418 57,119 8,473 — 104,010 Restructuring 2,822 3,616 — — 6,438 Earnings (loss) before income taxes, equity in earnings of subsidiaries, 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 (41,204 ) 370,991 62,118 — 391,905 Depreciation and amortization 13,272 262,914 57,205 225 333,616 Gain on asset disposals (47 ) (50,439 ) (255 ) — (50,741 ) Loss on asset decommissioning — 20,263 — — 20,263 Reversal of impairment of property, plant and equipment — (5,810 ) — — (5,810 ) Foreign exchange (8,499 ) (758 ) 535 — (8,722 ) Finance charges 118,775 (354 ) 32 — 118,453 Gain on redemption and repurchase of unsecured senior notes (6,815 ) — — — (6,815 ) Equity in earnings of subsidiaries (102,114 ) — — 102,114 — Earnings (loss) before income taxes (55,776 ) 145,175 4,601 (102,339 ) (8,339 ) Income taxes (62,619 ) 44,809 2,853 — (14,957 ) Net earnings (loss) $ 6,843 $ 100,366 $ 1,748 $ (102,339 ) $ 6,618 Condensed Consolidated Statement of Net Loss for the year ended December 31, 2018 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Revenue $ 104 $ 1,356,913 $ 191,131 $ (6,959 ) $ 1,541,189 Operating expense 83 949,451 124,689 (6,959 ) 1,067,264 General and administrative 52,638 48,748 10,444 — 111,830 Restructuring — 1,164 — — 1,164 Other recoveries (14,200 ) — — — (14,200 ) Earnings (loss) before income taxes, equity in loss of subsidiaries, gain on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of goodwill, gain on asset disposals and depreciation and amortization (38,417 ) 357,550 55,998 — 375,131 Depreciation and amortization 12,196 304,070 60,562 216 377,044 Gain on asset disposals (5,314 ) (6,051 ) (19 ) — (11,384 ) Impairment of goodwill — 207,544 — — 207,544 Foreign exchange 4,819 (443 ) (359 ) — 4,017 Finance charges 126,758 (233 ) 653 — 127,178 Gain on redemption and repurchase of unsecured senior notes (5,672 ) — — — (5,672 ) Equity in loss of subsidiaries 168,975 — — (168,975 ) — Loss before income taxes (340,179 ) (147,337 ) (4,839 ) 168,759 (323,596 ) Income taxes (46,125 ) 13,863 2,936 — (29,326 ) Net loss $ (294,054 ) $ (161,200 ) $ (7,775 ) $ 168,759 $ (294,270 )
Condensed Consolidated Statement of Comprehensive Income (Loss)	Condensed Consolidated Statement of Comprehensive Income (Loss) for the year ended December 31, 2019 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Net earnings $ 6,843 $ 100,366 $ 1,748 $ (102,339 ) $ 6,618 Other comprehensive income (loss) 79,022 (79,018 ) (27,655 ) (108 ) (27,759 ) Comprehensive income (loss) $ 85,865 $ 21,348 $ (25,907 ) $ (102,447 ) $ (21,141 ) Condensed Consolidated Statement of Comprehensive Income (Loss) for the year ended December 31, 2018 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Net loss $ (294,054 ) $ (161,200 ) $ (7,775 ) $ 168,759 $ (294,270 ) Other comprehensive income (loss) (145,226 ) 129,804 45,190 636 30,404 Comprehensive income (loss) $ (439,280 ) $ (31,396 ) $ 37,415 $ 169,395 $ (263,866 )
Condensed Consolidated Statement of Cash Flow	Condensed Consolidated Statement of Cash Flow for the year ended December 31, 2019 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Cash provided by (used in): Operations $ (189,376 ) $ 480,215 $ (2,680 ) $ — $ 288,159 Investments 408,753 (56,937 ) (15,337 ) (410,979 ) (74,500 ) Financing (226,379 ) (438,350 ) 21,936 410,979 (231,814 ) Effect of exchange rate changes on cash and cash equivalents (672 ) (1,415 ) (1,683 ) — (3,770 ) Increase (decrease) in cash and cash equivalents (7,674 ) (16,487 ) 2,236 — (21,925 ) Cash and cash equivalents, beginning of year 28,626 37,138 30,862 — 96,626 Cash and cash equivalents, end of year $ 20,952 $ 20,651 $ 33,098 $ — $ 74,701 Condensed Consolidated Statement of Cash Flow for the year ended December 31, 2018 Parent Guarantor Subsidiaries Non-Guarantor Subsidiaries Consolidating Adjustments Total Cash provided by (used in): Operations $ (102,901 ) $ 351,782 $ 44,453 $ — $ 293,334 Investments 277,501 (75,740 ) (16,253 ) (286,302 ) (100,794 ) Financing (169,085 ) (247,017 ) (39,285 ) 286,302 (169,085 ) Effect of exchange rate changes on cash and cash equivalents 2,268 2,691 3,131 — 8,090 Increase (decrease) in cash and cash equivalents 7,783 31,716 (7,954 ) — 31,545 Cash and cash equivalents, beginning of year 20,843 5,422 38,816 — 65,081 Cash and cash equivalents, end of year $ 28,626 $ 37,138 $ 30,862 $ — $ 96,626

Subsidiaries (Tables)

Subsidiaries (Tables)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Significant Investments In Subsidiaries [Abstract]
Summary of Subsidiaries	Ownership Interest Country of Incorporation 2019 2018 Precision Limited Partnership Canada 100 100 Precision Drilling Canada Limited Partnership Canada 100 100 Precision Diversified Oilfield Services Corp. Canada 100 100 Precision Directional Services Ltd. Canada 100 100 Precision Drilling (US) Corporation United States 100 100 Precision Drilling Holdings Company United States 100 100 Precision Drilling Company LP United States 100 100 Precision Completion & Production Services Ltd. United States 100 100 Precision Directional Services, Inc. United States 100 100 Grey Wolf Drilling Limited Barbados 100 100 Grey Wolf Drilling (Barbados) Ltd. Barbados 100 100

Significant Accounting Polici_4

Significant Accounting Policies - Additional Information (Details) - CAD ($) $ in Thousands	Jan. 01, 2019	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Significant Accounting Policies [Line Items]
Cash and cash equivalents original maturity		three months or less
Carrying value of right of use assets	$ 73,464	$ 66,142	$ 0
Weighted average incremental borrowing rates applied	6.10%
Deferred base rent balance	$ 3,000
Top of Range [Member]
Disclosure Of Significant Accounting Policies [Line Items]
Operating leases, remaining term	12 months
Top of Range [Member] | Software [Member]
Disclosure Of Significant Accounting Policies [Line Items]
Expected useful life of intangible asset		10 years

Summary of Property, Plant, and

Summary of Property, Plant, and Equipment Expected Life Salvage Value and Basis of Depreciation (Detail)	12 Months Ended
	Dec. 31, 2019
Drilling Rig Power and Tubulars Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	5 years
Basis of Depreciation	straight-line
Drilling Rig Dynamic Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	10 years
Basis of Depreciation	straight-line
Drilling Rig Structural Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	20 years
Salvage Value	10.00%
Basis of Depreciation	straight-line
Service Rig Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	20 years
Salvage Value	10.00%
Basis of Depreciation	straight-line
Drilling Rig Spare Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	up to 15 years
Basis of Depreciation	straight-line
Service Rig Spare Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	up to 15 years
Basis of Depreciation	straight-line
Rental Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	up to 15 years
Rental Equipment [Member] | Top of Range [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Salvage Value	25.00%
Basis of Depreciation	straight-line
Rental Equipment [Member] | Bottom Of Range [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Salvage Value	0.00%
Other Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	3 to 10 years
Basis of Depreciation	straight-line
Light Duty Vehicles [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	4 years
Basis of Depreciation	straight-line
Heavy Duty Vehicles [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	7 to 10 years
Basis of Depreciation	straight-line
Buildings [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Expected Life	10 to 20 years
Basis of Depreciation	straight-line

Disclosure of Deferred Base Ren

Disclosure of Deferred Base Rent Balance Under Straight-line Amortize Over Lease Term (Detail) - CAD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Disclosure Of Significant Accounting Policies [Abstract]
Right of use asset	$ 66,142	$ 73,464	$ 0
Accounts payable and accrued liabilities	(199,478)	(2,800)	(274,489)
Lease obligation		(73,464)
Deficit	$ (969,456)	$ 2,800	$ (978,874)

Summary Of Straight-line Amorti

Summary Of Straight-line Amortize Expenses Over Term Of Lease (Details) $ in Thousands	Jan. 01, 2019CAD ($)
Disclosure Of Significant Accounting Policies [Abstract]
Operating lease commitment at December 31, 2018	$ 67,392
Discounted using the incremental borrowing rate at January 1, 2019	54,517
Extension options reasonably certain to be exercised	18,947
Lease obligation	$ 73,464

Summary of Reconciliation of Di

Summary of Reconciliation of Disaggregated Revenue by Primary Geographical Market (Detail) - CAD ($) $ in Thousands	12 Months Ended
	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

Summary of Reconciliation of _2

Summary of Reconciliation of Disaggregated Revenue by Type of Service Provided (Detail) - CAD ($) $ in Thousands	12 Months Ended
	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)
Day Rate Or Hourly Services [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	1,480,038	1,452,326
Day Rate Or Hourly Services [Member] | Contract Drilling Services [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	1,333,114	1,302,575
Day Rate Or Hourly Services [Member] | Completion and Production Services [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	147,829	150,760
Day Rate Or Hourly Services [Member] | Inter- Segment Eliminations [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	(905)	(1,009)
Shortfall Payments Or Idle But Contracted [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	9,789	12,520
Shortfall Payments Or Idle But Contracted [Member] | Contract Drilling Services [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	9,789	12,520
Turnkey Drilling Services [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	3,754	37,811
Turnkey Drilling Services [Member] | Contract Drilling Services [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	3,754	37,811
Directional Services [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	41,876	31,943
Directional Services [Member] | Contract Drilling Services [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	41,876	31,943
Other [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	5,863	6,589
Other [Member] | Contract Drilling Services [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	10,535	11,643
Other [Member] | Inter- Segment Eliminations [Member]
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]
Revenue	$ (4,672)	$ (5,054)

Segmented Information - Additio

Segmented Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019Segment
Disclosure Of Operating Segments [Abstract]
Number of operating segments	2

Summary of Operating Segments (

Summary of Operating Segments (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of operating segments [Line Items]
Revenue	$ 1,541,320	$ 1,541,189
Operating earnings (loss)	(8,339)	(323,596)
Depreciation and amortization	333,616	377,044
Impairment of goodwill		207,544
Total assets	3,269,840	3,636,043
All Other Segments [Member]
Disclosure of operating segments [Line Items]
Revenue	1,541,320	1,541,189
Operating earnings (loss)	94,577	(198,073)
Depreciation and amortization	333,616	377,044
Loss (gain) on asset disposals	(50,741)	(11,384)
Impairment of goodwill		207,544
Loss on asset decommissioning	20,263
Reversal of impairment of property, plant and equipment	(5,810)
Total assets	3,269,840	3,636,043
Capital expenditures	160,694	126,143
Contract Drilling Services [Member]
Disclosure of operating segments [Line Items]
Revenue	1,399,068	1,396,492
Contract Drilling Services [Member] | All Other Segments [Member]
Disclosure of operating segments [Line Items]
Revenue	1,399,068	1,396,492
Operating earnings (loss)	160,997	(129,965)
Depreciation and amortization	300,882	341,712
Loss (gain) on asset disposals	(46,849)	(7,157)
Impairment of goodwill		207,544
Loss on asset decommissioning	20,263
Reversal of impairment of property, plant and equipment	(5,810)
Total assets	2,963,260	3,301,457
Capital expenditures	154,066	108,610
Completion and Production Services [Member]
Disclosure of operating segments [Line Items]
Revenue	147,829	150,760
Completion and Production Services [Member] | All Other Segments [Member]
Disclosure of operating segments [Line Items]
Revenue	147,829	150,760
Operating earnings (loss)	10,041	(8,998)
Depreciation and amortization	17,881	22,801
Loss (gain) on asset disposals	(3,767)	1,078
Total assets	152,611	170,113
Capital expenditures	5,448	5,004
Corporate and Other [Member] | All Other Segments [Member]
Disclosure of operating segments [Line Items]
Operating earnings (loss)	(76,461)	(59,110)
Depreciation and amortization	14,853	12,531
Loss (gain) on asset disposals	(125)	(5,305)
Total assets	153,969	164,473
Capital expenditures	1,180	12,529
Inter- Segment Eliminations [Member]
Disclosure of operating segments [Line Items]
Revenue	(5,577)	(6,063)
Inter- Segment Eliminations [Member] | All Other Segments [Member]
Disclosure of operating segments [Line Items]
Revenue	$ (5,577)	$ (6,063)

Summary of Operating Earnings (

Summary of Operating Earnings (Loss) to Loss Before Income Taxes (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Operating Segments [Abstract]
Operating earnings (loss)	$ 94,577	$ (198,073)
Foreign exchange	(8,722)	4,017
Finance charges	118,453	127,178
Gain on redemption and repurchase of unsecured senior notes	(6,815)	(5,672)
Loss before income taxes	$ (8,339)	$ (323,596)

Summary of Operating Segments b

Summary of Operating Segments by Geographic Locations (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of geographical areas [Line Items]
Revenue	$ 1,541,320	$ 1,541,189
Total assets	3,269,840	3,636,043
United States [Member]
Disclosure of geographical areas [Line Items]
Revenue	871,651	791,312
Total assets	1,560,523	1,772,850
Canada [Member]
Disclosure of geographical areas [Line Items]
Revenue	459,377	558,746
Total assets	1,133,591	1,269,542
International [Member]
Disclosure of geographical areas [Line Items]
Revenue	210,292	191,131
Total assets	$ 575,726	$ 593,651

Assets Held for Sale - Addition

Assets Held for Sale - Additional Information (Detail) $ in Millions	Dec. 31, 2018CAD ($)
Noncurrent Assets Or Disposal Groups Classified As Held For Sale Or As Held For Distribution To Owners [Abstract]
Carrying value of disposal group	$ 20

Schedule of Property, Plant and

Schedule of Property, Plant and Equipment (Detail) - CAD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	$ 2,749,463	$ 3,038,612
Rig Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	2,510,505	2,745,172
Rental Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	34,437	43,992
Other Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	38,604	52,195
Vehicles [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	7,796	12,702
Buildings [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	56,834	65,561
Assets Under Construction [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	67,740	84,561
Land [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	33,547	34,429
Gross [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	6,670,979	6,937,062	$ 6,733,634
Gross [Member] | Rig Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	6,109,383	6,322,536	6,034,166
Gross [Member] | Rental Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	110,307	130,463	148,011
Gross [Member] | Other Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	185,319	191,290	244,950
Gross [Member] | Vehicles [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	38,506	45,456	43,201
Gross [Member] | Buildings [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	126,177	128,327	127,385
Gross [Member] | Assets Under Construction [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	67,740	84,561	102,035
Gross [Member] | Land [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	33,547	34,429	33,886
Accumulated Depreciation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	3,921,516	3,898,450	3,559,810
Accumulated Depreciation [Member] | Rig Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	3,598,878	3,577,364	3,210,384
Accumulated Depreciation [Member] | Rental Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	75,870	86,471	87,832
Accumulated Depreciation [Member] | Other Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	146,715	139,095	178,390
Accumulated Depreciation [Member] | Vehicles [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	30,710	32,754	26,921
Accumulated Depreciation [Member] | Buildings [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Property, plant and equipment	$ 69,343	$ 62,766	$ 56,283

Change in Property, Plant and E

Change in Property, Plant and Equipment (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	$ 3,038,612
Reversal of impairment of property, plant and equipment	(5,810)
Ending Balance	2,749,463	$ 3,038,612
Gross [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	6,937,062	6,733,634
Additions	159,886	114,576
Disposals	(100,707)	(115,029)
Reclassification to assets held for sale		(135,398)
Asset decommissioning	(4,364)
Effect of foreign currency exchange differences	(320,898)	339,279
Ending Balance	6,670,979	6,937,062
Accumulated Depreciation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	3,898,450	3,559,810
Depreciation expense	320,736	373,572
Disposals	(59,962)	(102,886)
Reclassification to assets held for sale		(115,740)
Asset decommissioning	(3,518)
Reversal of impairment of property, plant and equipment	(5,810)
Effect of foreign currency exchange differences	(228,380)	183,694
Ending Balance	3,921,516	3,898,450
Rig Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	2,745,172
Ending Balance	2,510,505	2,745,172
Rig Equipment [Member] | Gross [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	6,322,536	6,034,166
Additions	18,436	7,013
Disposals	(69,945)	(32,153)
Reclassifications	150,674	127,668
Reclassification to assets held for sale		(135,398)
Asset decommissioning	(4,364)
Effect of foreign currency exchange differences	(307,954)	321,240
Ending Balance	6,109,383	6,322,536
Rig Equipment [Member] | Accumulated Depreciation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	3,577,364	3,210,384
Depreciation expense	289,056	335,215
Disposals	(33,929)	(28,399)
Reclassification to assets held for sale		(115,740)
Asset decommissioning	(3,518)
Reversal of impairment of property, plant and equipment	(5,810)
Effect of foreign currency exchange differences	(224,285)	175,904
Ending Balance	3,598,878	3,577,364
Rental Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	43,992
Ending Balance	34,437	43,992
Rental Equipment [Member] | Gross [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	130,463	148,011
Disposals	(19,982)	(18,227)
Effect of foreign currency exchange differences	(174)	679
Ending Balance	110,307	130,463
Rental Equipment [Member] | Accumulated Depreciation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	86,471	87,832
Depreciation expense	7,473	9,418
Disposals	(17,933)	(11,249)
Effect of foreign currency exchange differences	(141)	470
Ending Balance	75,870	86,471
Other Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	52,195
Ending Balance	38,604	52,195
Other Equipment [Member] | Gross [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	191,290	244,950
Additions	976	347
Disposals	(4,708)	(59,865)
Reclassifications	1,197	507
Effect of foreign currency exchange differences	(3,436)	5,351
Ending Balance	185,319	191,290
Other Equipment [Member] | Accumulated Depreciation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	139,095	178,390
Depreciation expense	13,023	15,993
Disposals	(3,274)	(59,857)
Effect of foreign currency exchange differences	(2,129)	4,569
Ending Balance	146,715	139,095
Vehicles [member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	12,702
Ending Balance	7,796	12,702
Vehicles [member] | Gross [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	45,456	43,201
Additions	224
Disposals	(6,014)	(228)
Effect of foreign currency exchange differences	(1,160)	2,483
Ending Balance	38,506	45,456
Vehicles [member] | Accumulated Depreciation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	32,754	26,921
Depreciation expense	3,521	4,820
Disposals	(4,768)	(220)
Effect of foreign currency exchange differences	(797)	1,233
Ending Balance	30,710	32,754
Buildings [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	65,561
Ending Balance	56,834	65,561
Buildings [Member] | Gross [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	128,327	127,385
Additions	415	569
Disposals	(58)	(3,663)
Effect of foreign currency exchange differences	(2,507)	4,036
Ending Balance	126,177	128,327
Buildings [Member] | Accumulated Depreciation [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	62,766	56,283
Depreciation expense	7,663	8,126
Disposals	(58)	(3,161)
Effect of foreign currency exchange differences	(1,028)	1,518
Ending Balance	69,343	62,766
Assets Under Construction [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	84,561
Ending Balance	67,740	84,561
Assets Under Construction [Member] | Gross [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	84,561	102,035
Additions	139,835	106,647
Reclassifications	(151,871)	(128,175)
Effect of foreign currency exchange differences	(4,785)	4,054
Ending Balance	67,740	84,561
Land [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	34,429
Ending Balance	33,547	34,429
Land [Member] | Gross [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Beginning Balance	34,429	33,886
Disposals		(893)
Effect of foreign currency exchange differences	(882)	1,436
Ending Balance	$ 33,547	$ 34,429

Property, Plant and Equipment -

Property, Plant and Equipment - Additional Information (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019CAD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018CAD ($)
Disclosure of detailed information about property, plant and equipment [Line Items]
Reversal of impairment charge	$ 5,810
Goodwill impairment charges			$ 207,544
Increase in depreciation amount	3,000
Mexico Based Drilling Rigs And Ancillary Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Proceeds from disposal		$ 48
Gains on disposals of assets		24
Reversal of impairment charge		4
Snubbing Units and Related Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Proceeds from disposal		8
Gains on disposals of assets		$ 3
Drilling and Ancillary Equipment [Member]
Disclosure of detailed information about property, plant and equipment [Line Items]
Gains on disposals of assets	$ 20,000

Schedule of Intangibles (Detail

Schedule of Intangibles (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about intangible assets [Line Items]
Balance	$ 31,746	$ 35,401
Loan commitment fees related to Senior Credit Facility	2,272	2,307
Software	29,474	33,094
Balance	35,401
Gross [Member]
Disclosure of detailed information about intangible assets [Line Items]
Balance	53,416	51,912
Balance	51,912	39,707
Additions	1,510	12,205
Effect of foreign currency exchange differences	(6)
Gross [Member] | Loan Commitment Fees [Member]
Disclosure of detailed information about intangible assets [Line Items]
Balance	15,478	14,776
Balance	14,776	14,138
Additions	702	638
Gross [Member] | Software [Member]
Disclosure of detailed information about intangible assets [Line Items]
Balance	37,938	37,136
Balance	37,136	25,569
Additions	808	11,567
Effect of foreign currency exchange differences	(6)
Accumulated Amortization [member]
Disclosure of detailed information about intangible assets [Line Items]
Balance	21,670	16,511
Balance	16,511	11,591
Amortization expense	5,159	4,920
Accumulated Amortization [member] | Loan Commitment Fees [Member]
Disclosure of detailed information about intangible assets [Line Items]
Balance	13,206	12,469
Balance	12,469	11,018
Amortization expense	737	1,451
Accumulated Amortization [member] | Software [Member]
Disclosure of detailed information about intangible assets [Line Items]
Balance	8,464	4,042
Balance	4,042	573
Amortization expense	$ 4,422	$ 3,469

Summary of Goodwill (Detail)

Summary of Goodwill (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018CAD ($)
Disclosure Of Reconciliation Of Changes In Goodwill [Abstract]
Goodwill at beginning of period	$ 205,167
Impairment charge	(207,544)
Exchange adjustment	2,377
Goodwill at end of period	$ 0

Goodwill - Additional Informati

Goodwill - Additional Information (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of information for cash-generating units [Line Items]
Goodwill impairment charges		$ 207,544
Projected cash flows period	five-year
Canadian Contract Drilling CGU [member]
Disclosure of information for cash-generating units [Line Items]
Goodwill impairment charges		$ 172,000
Recoverable amount of asset or cash-generating unit		11.66%
Value in use		$ 942,000
Canada Contract Drilling CGU [member]
Disclosure of information for cash-generating units [Line Items]
Percentage increase in discount rates resulted in additional impairment		0.50%
Additional impairment charges to remaining assets		$ 37,000
U.S. Directional Drilling CGU [member]
Disclosure of information for cash-generating units [Line Items]
Goodwill impairment charges		$ 35,000
Recoverable amount of asset or cash-generating unit		12.16%
Value in use		$ 39,000
Percentage increase in discount rates resulted in additional impairment		0.50%
Additional impairment charges to remaining assets		$ 2,000

Schedule of Long Term Borrowing

Schedule of Long Term Borrowings (Detail) $ in Thousands, $ in Thousands	Dec. 31, 2019CAD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018CAD ($)	Dec. 31, 2018USD ($)
Disclosure of long term debt [Line Items]
Long-term debt, gross	$ 1,445,127	$ 1,112,895	$ 1,729,351	$ 1,266,729
Less net unamortized debt issue costs	(17,946)		(23,098)
Long-term debt	1,427,181		1,706,253
6.5% Senior Notes Due 2021 [Member]
Disclosure of long term debt [Line Items]
Long-term debt, gross	117,678	90,625	226,113	165,625
7.75% Senior Notes Due 2023 [Member]
Disclosure of long term debt [Line Items]
Long-term debt, gross	447,792	344,845	477,823	350,000
5.25% Senior Notes Due 2024 [Member]
Disclosure of long term debt [Line Items]
Long-term debt, gross	399,545	307,690	479,331	351,104
7.125% Senior Notes Due 2026 [Member]
Disclosure of long term debt [Line Items]
Long-term debt, gross	$ 480,112	$ 369,735	$ 546,084	$ 400,000

Schedule of Long Term Borrowi_2

Schedule of Long Term Borrowings (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2019
6.5% Senior Notes Due 2021 [Member]
Disclosure of long term debt [Line Items]
Long term debt interest rate	6.50%
Long term debt maturity year	December 15, 2021
7.75% Senior Notes Due 2023 [Member]
Disclosure of long term debt [Line Items]
Long term debt interest rate	7.75%
Long term debt maturity year	December 15, 2023
5.25% Senior Notes Due 2024 [Member]
Disclosure of long term debt [Line Items]
Long term debt interest rate	5.25%
Long term debt maturity year	November 15, 2024
7.125% Senior Notes Due 2026 [Member]
Disclosure of long term debt [Line Items]
Long term debt interest rate	7.125%
Long term debt maturity year	January 15, 2026

Summary of Changes in Long Term

Summary of Changes in Long Term Borrowings (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of long term debt [Line Items]
Beginning balance	$ 1,706,253	$ 1,730,437
Redemption and repurchase of unsecured senior notes	(198,387)	(168,722)
Non-cash changes:
Gain on redemption and repurchase of unsecured senior notes	(6,815)	(5,672)
Amortization of debt issue costs	5,152	4,984
Foreign exchange adjustment	(79,022)	145,226
Ending balance	1,427,181	1,706,253
Unsecured Senior Notes [Member]
Disclosure of long term debt [Line Items]
Beginning balance	1,729,351	1,758,519
Redemption and repurchase of unsecured senior notes	(198,387)	(168,722)
Non-cash changes:
Gain on redemption and repurchase of unsecured senior notes	(6,815)	(5,672)
Foreign exchange adjustment	(79,022)	145,226
Ending balance	1,445,127	1,729,351
Debt Issue Costs [Member]
Disclosure of long term debt [Line Items]
Beginning balance	(23,098)	(28,082)
Non-cash changes:
Amortization of debt issue costs	5,152	4,984
Ending balance	$ (17,946)	$ (23,098)

Long-Term Debt Maturities (Deta

Long-Term Debt Maturities (Detail) $ in Thousands, $ in Thousands	Dec. 31, 2019CAD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018CAD ($)	Dec. 31, 2018USD ($)
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]
Long-term debt, gross	$ 1,445,127	$ 1,112,895	$ 1,729,351	$ 1,266,729
2021 [Member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]
Long-term debt, gross	117,678
2023 [Member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]
Long-term debt, gross	447,792
Thereafter [Member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]
Long-term debt, gross	$ 879,657

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jan. 01, 2020USD ($)	Dec. 31, 2019CAD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018CAD ($)
Disclosure of long term debt [Line Items]
Description of compliance with covenants	The unsecured senior notes require Precision to comply with certain restrictive and financial covenants including an incurrence based test of Consolidated Interest Coverage Ratio, as defined in the senior note agreements, of greater than or equal to 2.0:1 for the most recent four consecutive fiscal quarters. In the event that the Consolidated Interest Coverage Ratio is less than 2.0:1 for the most recent four consecutive fiscal quarters the senior notes restrict our ability to incur additional indebtedness.
Maximum Consolidated Interest Coverage Ratio to incur additional indebtedness				200.00%	200.00%
Description of compliance with covenants	The unsecured senior notes also contain a restricted payments covenant that limits Precision’s ability to make payments in the nature of dividends, distributions and for repurchases from shareholders. This restricted payment basket grows by, among other things, 50% of cumulative consolidated net earnings, and decreases by 100% of cumulative consolidated net losses as defined in the note agreements, and cumulative payments made to shareholders. As at December 31, 2019, the governing net restricted payments basket was negative $517 million (2018 – negative $496 million), therefore limiting us from making any further dividend payments or share repurchases until the governing restricted payments basket once again becomes positive.
Net restricted payments basket				$ (517)		$ (496)
Proportion of ownership interest in subsidiary	100.00%
Senior Credit Facility [Member]
Disclosure of long term debt [Line Items]
Borrowings maximum borrowing capacity					$ 500,000,000
Adjusted EBITDA to interest expense coverage ratio	250.00%
Credit facility amount withdrawn					0
Borrowings maximum available letters of credit					200,000,000
Outstanding letters of credit	$ 25,000,000	$ 28,000,000
Senior Credit Facility [Member] | Periods ending December 31, 2019 [Member]
Disclosure of long term debt [Line Items]
Adjusted EBITDA to interest expense coverage ratio	250.00%
Senior Credit Facility [Member] | Periods ending March 31, 2020 [Member]
Disclosure of long term debt [Line Items]
Adjusted EBITDA to interest expense coverage ratio	250.00%
Senior Credit Facility [Member] | Periods ending April 1, 2019 [Member]
Disclosure of long term debt [Line Items]
Adjusted EBITDA to interest expense coverage ratio	175.00%
Senior Credit Facility [Member] | Future Assets [Member]
Disclosure of long term debt [Line Items]
Borrowings additional borrowing capacity					$ 300,000,000
6.5% Senior Notes Due 2021 [Member]
Disclosure of long term debt [Line Items]
Interest rate				6.50%	6.50%
Maturity date	December 15, 2021
Borrowings frequency of payments	Interest is payable semi-annually on June 15 and December 15 of each year.
Amount redeemed					$ 75,000,000
Repurchase price					$ 76,000,000
6.5% Senior Notes Due 2021 [Member] | After December 15, 2019 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				101.00%	101.00%
6.5% Senior Notes Due 2021 [Member] | Events After Reporting Period [Member]
Disclosure of long term debt [Line Items]
Amount redeemed			$ 25,000,000
Repurchase price			25,000,000
7.75% Senior Notes Due 2023 [Member]
Disclosure of long term debt [Line Items]
Interest rate				7.75%	7.75%
Maturity date	December 15, 2023
Borrowings frequency of payments	Interest is payable semi-annually on June15 and December15 of each year.
Repurchase price					$ 5,000,000
Repurchased and cancelled					$ 5,000,000
7.75% Senior Notes Due 2023 [Member] | Any time on or after December 15, 2021 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				101.00%	101.00%
7.75% Senior Notes Due 2023 [Member] | Bottom Of Range [Member] | Precision may redeem these notes in whole or in part at any time on or after December 15, 2019 and before December 15, 2021 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				101.938%	101.938%
7.75% Senior Notes Due 2023 [Member] | Top of Range [Member] | Precision may redeem these notes in whole or in part at any time on or after December 15, 2019 and before December 15, 2021 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				103.875%	103.875%
5.25% Senior Notes Due 2024 [Member]
Disclosure of long term debt [Line Items]
Interest rate				5.25%	5.25%
Maturity date	November 15, 2024
Borrowings frequency of payments	Interest is payable semi-annually on May 15 and November 15 of each year.
Amount redeemed					$ 43,000,000
Repurchase price					$ 39,000,000
5.25% Senior Notes Due 2024 [Member] | Any time on or after May 15, 2022 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				101.00%	101.00%
5.25% Senior Notes Due 2024 [Member] | Bottom Of Range [Member] | Precision may redeem these notes in whole or in part at any time on or after May 15, 2019 and before May 15, 2022 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				100.875%	100.875%
5.25% Senior Notes Due 2024 [Member] | Top of Range [Member] | Precision may redeem these notes in whole or in part at any time on or after May 15, 2019 and before May 15, 2022 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				102.625%	102.625%
5.25% Senior Notes Due 2024 [Member] | Events After Reporting Period [Member]
Disclosure of long term debt [Line Items]
Repurchase price			4,000,000
Repurchased and cancelled			5,000,000
7.125% Senior Notes Due 2026 [Member]
Disclosure of long term debt [Line Items]
Interest rate				7.125%	7.125%
Maturity date	January 15, 2026
Borrowings frequency of payments	Interest is payable semi-annually on January 15 and July 15 of each year, commencing July 15, 2018.
Amount redeemed					$ 30,000,000
Repurchase price					$ 29,000,000
7.125% Senior Notes Due 2026 [Member] | Prior to November 15, 2020, Precision may redeem up to 35% of the 7.125% senior notes due 2026 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				107.125%	107.125%
Borrowings maximum percentage of principal amount redeemed				35.00%	35.00%
7.125% Senior Notes Due 2026 [Member] | Prior to November 15, 2020, Precision may redeem these notes in whole or in part [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				100.00%	100.00%
7.125% Senior Notes Due 2026 [Member] | Any time on or after November 15, 2023 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				101.00%	101.00%
7.125% Senior Notes Due 2026 [Member] | Bottom Of Range [Member] | Precision may redeem these notes in whole or in part at any time on or after November 15, 2020 and before November 15, 2022 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				101.781%	101.781%
7.125% Senior Notes Due 2026 [Member] | Top of Range [Member] | Precision may redeem these notes in whole or in part at any time on or after November 15, 2020 and before November 15, 2022 [Member]
Disclosure of long term debt [Line Items]
Redemption price percentage				105.344%	105.344%
7.125% Senior Notes Due 2026 [Member] | Events After Reporting Period [Member]
Disclosure of long term debt [Line Items]
Repurchase price			2,000,000
Repurchased and cancelled			$ 2,000,000

Schedule of Listing of Currentl

Schedule of Listing of Currently Applicable Restrictive and Financial Covenants (Detail)	12 Months Ended
	Dec. 31, 2019
Senior Credit Facility [Member]
Disclosure of long term debt [Line Items]
Consolidated senior debt to consolidated covenant EBITDA(1)	0.00%
Consolidated covenant EBITDA to consolidated interest expense	3.39%
Senior Credit Facility [Member] | Top of Range [Member]
Disclosure of long term debt [Line Items]
Consolidated senior debt to consolidated covenant EBITDA(1)	2.50%
Senior Credit Facility [Member] | Bottom Of Range [Member]
Disclosure of long term debt [Line Items]
Consolidated covenant EBITDA to consolidated interest expense	2.50%
Unsecured Senior Notes [Member]
Disclosure of long term debt [Line Items]
Consolidated interest coverage ratio	3.30%
Unsecured Senior Notes [Member] | Bottom Of Range [Member]
Disclosure of long term debt [Line Items]
Consolidated interest coverage ratio	2.00%

Restructuring and Other Recov_2

Restructuring and Other Recoveries - Additional Information (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Restructuring And Other Recoveries [Abstract]
Restructuring charge	$ 6,438	$ 1,164
Other recoveries relating to transactions costs		$ 14,000

Summary of Finance Charges (Det

Summary of Finance Charges (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Interest:
Long-term debt	$ 110,730	$ 121,810
Lease obligation	3,389
Other	21	378
Income	(1,576)	(1,444)
Amortization of debt issue costs	5,889	6,434
Finance charges	$ 118,453	$ 127,178

Summary of Right-of-Use-Assets

Summary of Right-of-Use-Assets (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019CAD ($)
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Balance, January 1, 2019	$ 0
Transition adjustments	73,464
Additions	1,947
Derecognition	(29)
Depreciation	(8,458)
Lease remeasurements	163
Effect of foreign currency exchange differences	(945)
Balance, December 31, 2019	66,142
Real Estate [member]
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Balance, January 1, 2019	0
Transition adjustments	58,635
Additions	0
Derecognition	(29)
Depreciation	(4,055)
Lease remeasurements	163
Effect of foreign currency exchange differences	(688)
Balance, December 31, 2019	54,026
Vehicles and Equipment [Member]
Disclosure Of Quantitative Information About Rightofuse Assets [Line Items]
Balance, January 1, 2019	0
Transition adjustments	14,829
Additions	1,947
Derecognition	0
Depreciation	(4,403)
Lease remeasurements	0
Effect of foreign currency exchange differences	(257)
Balance, December 31, 2019	$ 12,116

Leases - Additional Information

Leases - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2019CAD ($)
Leases Disclosure [Line Items]
Cash outflow in relation to lease obligation	$ 10
Percentage of total contract drilling revenue pertained to drilling rigs working under term contracts	59.00%
Real Estate [member] | Bottom Of Range [Member]
Leases Disclosure [Line Items]
Terms of operating lease commitments	1 year
Real Estate [member] | Top of Range [Member]
Leases Disclosure [Line Items]
Terms of operating lease commitments	10 years
Vehicles [member] | Bottom Of Range [Member]
Leases Disclosure [Line Items]
Terms of operating lease commitments	3 years
Vehicles [member] | Top of Range [Member]
Leases Disclosure [Line Items]
Terms of operating lease commitments	4 years
Rig Equipment [Member]
Leases Disclosure [Line Items]
Long-term drilling contracts	$ 1,000
Rig Equipment [Member] | Bottom Of Range [Member]
Leases Disclosure [Line Items]
Term of operating leases under long term drilling contracts	1 year
Rig Equipment [Member] | Top of Range [Member]
Leases Disclosure [Line Items]
Term of operating leases under long term drilling contracts	5 years

Expected Non-cancellable Operat

Expected Non-cancellable Operating Lease Payments (Detail) - CAD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Disclosure of finance lease and operating lease by lessee [Line Items]
Non-cancellable operating lease	$ 56,637	$ 67,932
Less than one year [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Non-cancellable operating lease	11,954	13,496
One to five years [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Non-cancellable operating lease	33,566	36,639
More than five years [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Non-cancellable operating lease	$ 11,117	$ 17,797

Summary of Maturity Analysis of

Summary of Maturity Analysis of Lease Payments (Detail) $ in Thousands	Dec. 31, 2019CAD ($)
Disclosure of finance lease and operating lease by lessee [Line Items]
Undiscounted lease payments	$ 517,608
Less than one year [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Undiscounted lease payments	297,425
One to five years [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Undiscounted lease payments	207,746
More than five years [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Undiscounted lease payments	$ 12,437

Disclosure of Liability Classif

Disclosure of Liability Classified Plans (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	$ 12,411	$ 21,869
Expensed during the period	8,193	6,390
Payments	(7,092)	(15,848)
Ending balance	13,512	12,411
Current	4,682
Long-term	8,830	6,520
Restricted Share Units (RSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	5,409	6,950
Expensed during the period	5,755	5,223
Payments	(3,846)	(6,764)
Ending balance	7,318	5,409
Current	3,956
Long-term	3,362
Performance Share Units (PSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	4,521	11,407
Expensed during the period	1,583	398
Payments	(3,246)	(7,284)
Ending balance	2,858	4,521
Current	726
Long-term	2,132
Deferred Share Units (DSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	2,481	3,512
Expensed during the period	855	769
Payments		(1,800)
Ending balance	3,336	$ 2,481
Long-term	$ 3,336

Share Based Compensation Plan_2

Share Based Compensation Plans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019CAD ($)sharesYearIncentive_Plan	Dec. 31, 2018CAD ($)sharesYear$ / shares	Dec. 31, 2018CAD ($)$ / shares	Dec. 31, 2017CAD ($)Year$ / shares
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Number of cash-settled share based incentive plans | Incentive_Plan	2
Option vesting period	3 years
Option expiration term	7 years
Weighted average fair value of share options granted	$ 1.54	$ 1.96	$ 1.96
Average risk-free interest rate	2.50%	2.00%
Average expected life | Year	4	4
Expected forfeiture rate	5.00%	5.00%
Expected volatility	57.00%	56.00%
Stock-based compensation expense	$ (8,193,000)	$ (6,390,000)
Employee Stock Purchase Plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Eligible employees contribute	10.00%
Employees matching contribute percentage	20.00%
Compensation expense		1,000,000
Restricted Share Units (RSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Shares granted to eligible employees vest term	3 years
Stock-based compensation expense	$ (5,755,000)	(5,223,000)
Performance Share Units (PSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Shares granted to eligible employees vest term	3 years
Stock-based compensation expense	$ (1,583,000)	$ (398,000)
U.S. Share Options [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Options Outstanding, Exercised | shares	0	66,000
Weighted average share price | $ / shares			$ 4.02
Stock-based compensation expense	$ 2,000,000	$ 3,000,000
Executive Performance Share Units [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Weighted average share price | $ / shares		$ 3.23		$ 4.29
Weighted average fair value of share options granted		$ 4.11	$ 4.11	$ 6.22
Average risk-free interest rate		2.30%		2.30%
Average expected life | Year		3		3
Expected volatility		56.00%		59.00%
Stock-based compensation expense		$ 12,000,000		$ 6,000,000
Expected dividend yield		0.00%		0.00%

Summary of Shares Outstanding U

Summary of Shares Outstanding Under Share Based Incentive Plans (Detail)	12 Months Ended
	Dec. 31, 2019sharesStock_Unit$ / shares	Dec. 31, 2018sharesStock_Unit$ / shares
Equity-Settled Plans [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	93,173	195,743
Redeemed		(102,570)
Ending balance	93,173	93,173
Restricted Share Units (RSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance | Stock_Unit	4,055,914	2,796,858
Granted | Stock_Unit	4,187,350	2,918,912
Redeemed | Stock_Unit	(1,505,683)	(1,404,284)
Forfeited | Stock_Unit	(399,518)	(255,572)
Ending balance | Stock_Unit	6,338,063	4,055,914
Performance Share Units (PSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance | Stock_Unit	4,542,990	5,726,259
Granted | Stock_Unit	2,038,900	1,292,550
Redeemed | Stock_Unit	(1,322,758)	(2,137,163)
Forfeited | Stock_Unit	(1,923,782)	(338,656)
Ending balance | Stock_Unit	3,335,350	4,542,990
Deferred Share Units (DSUs) [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	1,053,635	953,277
Granted	738,619	474,766
Redeemed		(374,408)
Ending balance	1,792,254	1,053,635
Executive Performance Share Units [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning balance	3,191,067
Granted	4,211,600	2,082,800
Forfeited	(25,767)	(50,733)
Ending balance	7,376,900	3,191,067
Weighted Fair Value, Granted | $ / shares	$ 4.11	$ 6.22
Weighted Fair Value, Forfeited | $ / shares	6.02	6.12
Weighted Fair Value, Ending balance | $ / shares	$ 4.98	$ 6.14

Summary of Status of Equity Inc

Summary of Status of Equity Incentive Plan (Detail)	12 Months Ended
	Dec. 31, 2019shares$ / shares	Dec. 31, 2019shares$ / shares	Dec. 31, 2018shares$ / shares	Dec. 31, 2018shares$ / shares	Dec. 31, 2017shares
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Weighted Average Exercise Price, Forfeitures	$ 10.51		$ 10.58
Canadian Share Options [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Options Outstanding, Beginning balance | shares	4,733,156	4,733,156	4,900,360	4,900,360
Options Outstanding, Granted | shares			490,200	490,200
Options Outstanding, Forfeited | shares	(711,572)	(711,572)	(657,404)	(657,404)
Options Outstanding, Ending balance | shares	4,021,584	4,021,584	4,733,156	4,733,156
Weighted Average Exercise Price, Beginning balance	$ 7.78		$ 8.50
Weighted Average Exercise Price, Granted			4.35
Weighted Average Exercise Price, Ending balance	$ 7.29		$ 7.78
Options exercisable | shares	3,569,069	3,569,069	3,786,473	3,786,473	3,734,019
Canadian Share Options [Member] | Top of Range [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Range of Exercise Prices, Beginning balance	$ 14.31		$ 14.50
Range of Exercise Prices, Granted			4.35
Range of Exercise Prices, Forfeitures	10.67		14.50
Range of Exercise Prices, Ending balance	14.31		14.31
Canadian Share Options [Member] | Bottom Of Range [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Range of Exercise Prices, Beginning balance	4.35		4.46
Range of Exercise Prices, Granted			4.35
Range of Exercise Prices, Forfeitures	7.15		10.44
Range of Exercise Prices, Ending balance	$ 4.35		$ 4.35
U.S. Share Options [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Options Outstanding, Beginning balance | shares	6,065,850	6,065,850	5,558,621	5,558,621
Options Outstanding, Granted | shares	599,300	599,300	1,569,250	1,569,250
Options Outstanding, Exercised | shares	0	0	(66,000)	(66,000)
Options Outstanding, Forfeited | shares	(302,100)	(302,100)	(996,021)	(996,021)
Options Outstanding, Ending balance | shares	6,363,050	6,363,050	6,065,850	6,065,850
Weighted Average Exercise Price, Beginning balance		$ 5.17		$ 6.16
Weighted Average Exercise Price, Granted		2.56		3.45
Exercise Price Of Exercised Share Options				3.21
Weighted Average Exercise Price, Forfeitures		10.68		8.08
Weighted Average Exercise Price, Ending balance		$ 4.67		$ 5.17
Options exercisable | shares	4,348,824	4,348,824	3,224,078	3,224,078	2,891,808
U.S. Share Options [Member] | Top of Range [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Range of Exercise Prices, Beginning balance		$ 10.74		$ 15.21
Range of Exercise Prices, Granted		2.56		3.62
Range of Exercise Prices, Exercised				3.21
Range of Exercise Prices, Forfeitures		10.74		15.21
Range of Exercise Prices, Ending balance		9.18		10.74
U.S. Share Options [Member] | Bottom Of Range [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Range of Exercise Prices, Beginning balance		3.21		3.21
Range of Exercise Prices, Granted		2.56		3.44
Range of Exercise Prices, Exercised				3.21
Range of Exercise Prices, Forfeitures		7.79		3.21
Range of Exercise Prices, Ending balance		$ 2.56		$ 3.21

Range of Exercise Prices for Op

Range of Exercise Prices for Options Outstanding (Detail)	12 Months Ended
	Dec. 31, 2019shares$ / shares	Dec. 31, 2018shares$ / shares$ / shares	Dec. 31, 2019shares$ / shares	Dec. 31, 2018shares$ / shares	Dec. 31, 2017shares$ / shares	Dec. 31, 2017shares$ / shares
Canadian Share Options [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Number | shares	4,021,584	4,733,156	4,021,584	4,733,156	4,900,360	4,900,360
Total options outstanding, Weighted average exercise price | $ / shares	$ 7.29	$ 7.78			$ 8.50
Options exercisable, Number | shares	3,569,069	3,786,473	3,569,069	3,786,473	3,734,019	3,734,019
Canadian Share Options [Member] | 4.46 - 7.99 Range of Exercise Prices [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Number | shares	1,105,400		1,105,400
Total options outstanding, Weighted average exercise price | $ / shares	$ 4.41
Total options outstanding, Weighted average remaining contractual life (years)	4 years 14 days
Options exercisable, Number | shares	778,595		778,595
Options exercisable, Weighted average exercise price | $ / shares	$ 4.44
Canadian Share Options [Member] | 8.00 - 9.99 Range of Exercise Prices [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Number | shares	1,533,334		1,533,334
Total options outstanding, Weighted average exercise price | $ / shares	$ 7.32
Total options outstanding, Weighted average remaining contractual life (years)	2 years 7 months 2 days
Options exercisable, Number | shares	1,407,624		1,407,624
Options exercisable, Weighted average exercise price | $ / shares	$ 7.32
Canadian Share Options [Member] | 10.00 - 14.50 Range of Exercise Prices [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Number | shares	1,382,850		1,382,850
Total options outstanding, Weighted average exercise price | $ / shares	$ 9.57
Total options outstanding, Weighted average remaining contractual life (years)	6 months 21 days
Options exercisable, Number | shares	1,382,850		1,382,850
Options exercisable, Weighted average exercise price | $ / shares	$ 9.57
Canadian Share Options [Member] | 4.46 - 14.50 Range of Exercise Prices [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Number | shares	4,021,584		4,021,584
Total options outstanding, Weighted average exercise price | $ / shares	$ 7.29
Total options outstanding, Weighted average remaining contractual life (years)	2 years 3 months 14 days
Options exercisable, Number | shares	3,569,069		3,569,069
Options exercisable, Weighted average exercise price | $ / shares	$ 7.56
U.S. Share Options [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Number | shares	6,363,050	6,065,850	6,363,050	6,065,850	5,558,621	5,558,621
Total options outstanding, Weighted average exercise price | $ / shares			$ 4.67	$ 5.17		$ 6.16
Options exercisable, Number | shares	4,348,824	3,224,078	4,348,824	3,224,078	2,891,808	2,891,808
U.S. Share Options [Member] | Top of Range [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Range of exercise prices | $ / shares		$ 3.21
U.S. Share Options [Member] | Bottom Of Range [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Range of exercise prices | $ / shares		$ 3.21
U.S. Share Options [Member] | 3.21 - 4.99 Range of Exercise Prices [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Number | shares		3,646,250		3,646,250
Total options outstanding, Weighted average exercise price | $ / shares		$ 3.21
Total options outstanding, Weighted average remaining contractual life (years)		4 years 6 months
Options exercisable, Number | shares		2,011,540		2,011,540
Options exercisable, Weighted average exercise price | $ / shares		$ 3.27
U.S. Share Options [Member] | 5.00 - 7.99 Range of Exercise Prices [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Number | shares		1,924,500		1,924,500
Total options outstanding, Weighted average exercise price | $ / shares		$ 5.61
Total options outstanding, Weighted average remaining contractual life (years)		3 years 4 months 13 days
Options exercisable, Number | shares		1,544,984		1,544,984
Options exercisable, Weighted average exercise price | $ / shares		$ 5.62
U.S. Share Options [Member] | 8.00 - 15.21 Range of Exercise Prices [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Number | shares		792,300		792,300
Total options outstanding, Weighted average exercise price | $ / shares		$ 9.08
Total options outstanding, Weighted average remaining contractual life (years)		7 months 6 days
Options exercisable, Number | shares		792,300		792,300
Options exercisable, Weighted average exercise price | $ / shares		$ 9.08
U.S. Share Options [Member] | 3.21 - 15.21 Range of Exercise Prices [Member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Total options outstanding, Number | shares		6,363,050		6,363,050
Total options outstanding, Weighted average exercise price | $ / shares		$ 4.67
Total options outstanding, Weighted average remaining contractual life (years)		3 years 8 months 1 day
Options exercisable, Number | shares		4,348,824		4,348,824
Options exercisable, Weighted average exercise price | $ / shares		$ 5.17

Schedule of Provision for Incom

Schedule of Provision for Income Taxes (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation Of Changes In Deferred Tax Liability Asset [Abstract]
Loss before income taxes	$ (8,339)	$ (323,596)
Federal and provincial statutory rates	27.00%	27.00%
Tax at statutory rates	$ (2,252)	$ (87,371)
Adjusted for the effect of:
Non-deductible expenses	1,597	49,455
Non-taxable capital gains	(1,408)	(845)
Impact of foreign tax rates	(13,549)	4,861
Withholding taxes	1,262	1,061
Taxes related to prior years	(1,975)	3,803
Other	1,368	(290)
Income tax recovery	$ (14,957)	$ (29,326)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Change in provincial corporate income tax rate		12.00%
US federal corporate tax rate			21.00%	35.00%
Unrecognized tax benefits			$ 2
Interest and penalties included in unrecognized tax benefits			1
U.S. and international operations [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Loss carryforwards not recognized as deferred income tax asset		$ 31
Canada [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Loss carryforwards not recognized as deferred income tax asset		33
Temporary differences [Member] | International operations [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Tax effected temporary differences		$ 5
Temporary differences [Member] | U.S. and international operations [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Tax effected temporary differences			$ 37
Changes in tax rates or tax laws enacted or announced [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Change in provincial corporate income tax rate	8.00%

Summary of Net Deferred Tax Lia

Summary of Net Deferred Tax Liability (Detail) - CAD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax liability:
Property, plant and equipment and intangibles	$ 426,934	$ 467,109
Debt issue costs	3,280	3,534
Partnership deferrals	850	1,730
Other	7,926	5,722
Deferred income tax liability	438,990	478,095
Offsetting of assets and liabilities	(413,601)	(405,316)
Deferred tax liabilities	25,389	72,779
Deferred tax assets:
Losses (expire from time to time up to 2038)	402,025	423,595
Long-term incentive plan	6,131	6,849
Other	10,169	11,752
Deferred income tax asset	418,325	442,196
Offsetting of assets and liabilities	(413,601)	(405,316)
Deferred tax assets	4,724	36,880
Net deferred tax liability	$ 20,665	$ 35,899

Summary of Movement in Temporar

Summary of Movement in Temporary Differences of Deferred Tax Liabilities (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Beginning Balance	$ 35,899	$ 77,089
Recognized in net loss (earnings)	(16,037)	(37,899)
Effect of foreign currency exchange differences	803	(3,291)
Ending Balance	20,665	35,899
Property, Plant and Equipment and Intangibles [member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Beginning Balance	467,109	454,613
Recognized in net loss (earnings)	(26,825)	(9,667)
Effect of foreign currency exchange differences	(13,350)	22,163
Ending Balance	426,934	467,109
Partnership Deferrals [member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Beginning Balance	1,730	(335)
Recognized in net loss (earnings)	(880)	2,065
Ending Balance	850	1,730
Other Deferred Tax Liabilities [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Beginning Balance	5,722	6,709
Recognized in net loss (earnings)	2,216	(1,005)
Effect of foreign currency exchange differences	(12)	18
Ending Balance	7,926	5,722
Losses [member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Beginning Balance	(423,595)	(368,133)
Recognized in net loss (earnings)	7,874	(30,660)
Effect of foreign currency exchange differences	13,696	(24,802)
Ending Balance	(402,025)	(423,595)
Debt Issue Costs [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Beginning Balance	3,534	3,352
Recognized in net loss (earnings)	(254)	182
Ending Balance	3,280	3,534
Long-Term Incentive Plan [member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Beginning Balance	(6,849)	(7,935)
Recognized in net loss (earnings)	572	1,325
Effect of foreign currency exchange differences	146	(239)
Ending Balance	(6,131)	(6,849)
Other Deferred Tax Liabilities [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Beginning Balance	(11,752)	(11,182)
Recognized in net loss (earnings)	1,260	(139)
Effect of foreign currency exchange differences	323	(431)
Ending Balance	$ (10,169)	$ (11,752)

Bank Indebtedness - Additional

Bank Indebtedness - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019CAD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018CAD ($)	Dec. 31, 2018USD ($)
Disclosure of detailed information about financial instruments [Line Items]
Description of interest rate	Advances under the $40 million facility are available at the bank’s prime lending rate, U.S. base rate, U.S. LIBOR rate plus 80% of applicable margin, or 80% of the applicable margin for Banker’s Acceptances, or in combination, and under the US$15 million facility at the bank’s prime lending rate
40.0 Million Secured Operating Facilities [Member]
Disclosure of detailed information about financial instruments [Line Items]
Line of credit borrowing capacity	$ 40,000,000		$ 40,000,000
Line of credit outstanding	0		0
Letters of credit outstanding	$ 26,000,000		$ 28,000,000
15.0 Million Secured Operating Facilities [Member]
Disclosure of detailed information about financial instruments [Line Items]
Line of credit borrowing capacity		$ 15,000,000		$ 15,000,000
Line of credit outstanding		0		0
30.0 Million Operating Facilities [member]
Disclosure of detailed information about financial instruments [Line Items]
Line of credit borrowing capacity		30,000,000		30,000,000
Line of credit outstanding		0		0
Letters of credit outstanding		$ 2,000,000		$ 2,000,000

Change in Provisions and Other

Change in Provisions and Other (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Other Provisions [Abstract]
Beginning balance	$ 13,373	$ 13,232
Expensed during the year	4,047	3,359
Payment of deductibles and uninsured claims	(4,915)	(4,271)
Effects of foreign currency exchange differences	(639)	1,053
Ending balance	$ 11,866	$ 13,373

Balance Sheet Classification of

Balance Sheet Classification of Provisions and Other (Detail) - CAD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Other Provisions [Abstract]
Current	$ 1,907	$ 2,796
Long-term	9,959	10,577
Other provisions	$ 11,866	$ 13,373	$ 13,232

Schedule of Issued Capital (Det

Schedule of Issued Capital (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Classes Of Share Capital [Abstract]
Beginning balance, shares	293,781,836	293,238,858
Share repurchase	(16,482,032)
Issued on redemption of non-management directors' DSUs, shares		476,978
Options exercised - cash consideration, shares		66,000
Ending balance, shares	277,299,804	293,781,836
Beginning balance	$ 2,322,280	$ 2,319,293
Share repurchase	(25,902)
Issued on redemption of non-management directors' DSUs		2,609
Options exercised – cash consideration		275
– reclassification from contributed surplus		103
Ending balance	$ 2,296,378	$ 2,322,280

Shareholders Capital - Addition

Shareholders Capital - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2020	Dec. 31, 2019
Disclosure Of Classes Of Share Capital [Line Items]
Number of share purchase and cancel		16,000,000
Percentage of share purchase and cancel		10.00%
Purchase and cancel of shares		$ 26
Events After Reporting Period [Member]
Disclosure Of Classes Of Share Capital [Line Items]
Number of share purchase and cancel	3,000,000
Purchase and cancel of shares	$ 5
Top of Range [Member]
Disclosure Of Classes Of Share Capital [Line Items]
Number of share purchase and cancel		29,170,887

Summary of Per Share Amounts (D

Summary of Per Share Amounts (Detail) - CAD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Weighted Average Shares And Adjusted Weighted Average Shares [Abstract]
Net earnings (loss) for the period	$ 6,618	$ (294,270)
Weighted average shares outstanding – basic	290,782	293,560
Effect of stock options and other equity compensation plans	6,397	0
Weighted average shares outstanding – diluted	297,179	293,560

Summary of Accumulated Other Co

Summary of Accumulated Other Comprehensive Income (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 162,014
Other comprehensive income (loss)	(27,759)	$ 30,404
Ending Balance	134,255	162,014
Unrealized Foreign Currency Translation Gains (Losses) [member]
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	616,363	440,733
Other comprehensive income (loss)	(106,781)	175,630
Ending Balance	509,582	616,363
Foreign Exchange Gain (Loss) on Net Investment Hedge [member]
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(454,349)	(309,123)
Other comprehensive income (loss)	79,022	(145,226)
Ending Balance	(375,327)	(454,349)
Accumulated Other Comprehensive Income [Member]
Disclosure Of Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	162,014	131,610
Other comprehensive income (loss)	(27,759)	30,404
Ending Balance	$ 134,255	$ 162,014

Employee Benefit Plan - Additio

Employee Benefit Plan - Additional Information (Detail) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Employees Benefit [Abstract]
Individual contributions under defined contribution pension plan	5.00%
Total expense under the defined contribution plan	$ 13	$ 12

Compensation of Key Management

Compensation of Key Management Personnel (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Transactions Between Related Parties [Abstract]
Salaries and other benefits	$ 8,747	$ 6,732
Equity settled share based compensation	9,047	5,562
Cash settled share based compensation	1,432	722
Key management personnel compensation	$ 19,226	$ 13,016

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019
Disclosure Of Transactions Between Related Parties [Abstract]
Related party transactions, description	Certain executive officers have entered into employment agreements with Precision that provide termination benefits of up to 24 months base salary plus up to two times targeted incentive compensation upon dismissal without cause.

Capital Commitments - Additiona

Capital Commitments - Additional Information (Detail) - CAD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Disclosure of finance lease and operating lease by lessee [Line Items]
Commitments to purchase property, plant and equipment	$ 113	$ 180
2020 [Member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Commitments to purchase property, plant and equipment	25
2021 [Member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Commitments to purchase property, plant and equipment	53
2022 [Member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Commitments to purchase property, plant and equipment	$ 35

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) - CAD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [Line Items]
Fair value of unsecured senior notes	$ 1,428	$ 1,548
Credit Risk [Member]
Disclosure of detailed information about financial instruments [Line Items]
Trade receivables	$ 12	$ 18

Summary of Expected Credit Loss

Summary of Expected Credit Loss Allowance (Detail) - Trade receivables [Member] - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Allowance For Doubtful Accounts [Line Items]
Beginning balance	$ 1,470	$ 2,596
Impairment loss recognized	72	483
Amounts written-off as uncollectible	(537)	(416)
Impairment loss reversed	(24)	(1,247)
Effect of movement in exchange rates	(52)	54
Ending balance	$ 929	$ 1,470

Summary of Ageing of Trade Rece

Summary of Ageing of Trade Receivables (Detail) - CAD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Disclosure of provision matrix [Line Items]
Total Trade Receivables	$ 211,797	$ 264,589
Gross [Member]
Disclosure of provision matrix [Line Items]
Total Trade Receivables	212,726	266,059
Gross [Member] | Not Past Due [Member]
Disclosure of provision matrix [Line Items]
Total Trade Receivables	144,292	175,277
Gross [Member] | Past Due 0 - 30 Days [Member]
Disclosure of provision matrix [Line Items]
Total Trade Receivables	47,965	64,351
Gross [Member] | Past Due 31 - 120 Days [Member]
Disclosure of provision matrix [Line Items]
Total Trade Receivables	19,166	25,032
Gross [Member] | Past Due More than 120 Days [Member]
Disclosure of provision matrix [Line Items]
Total Trade Receivables	1,303	1,399
Provision for Impairment [Member]
Disclosure of provision matrix [Line Items]
Total Trade Receivables	929	1,470
Provision for Impairment [Member] | Not Past Due [Member]
Disclosure of provision matrix [Line Items]
Total Trade Receivables	1
Provision for Impairment [Member] | Past Due 0 - 30 Days [Member]
Disclosure of provision matrix [Line Items]
Total Trade Receivables	8
Provision for Impairment [Member] | Past Due 31 - 120 Days [Member]
Disclosure of provision matrix [Line Items]
Total Trade Receivables	28	71
Provision for Impairment [Member] | Past Due More than 120 Days [Member]
Disclosure of provision matrix [Line Items]
Total Trade Receivables	$ 892	$ 1,399

Summary of Financial Instrument

Summary of Financial Instruments were Denominated in U S Dollars (Detail) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2019CAD ($)	Dec. 31, 2019USD ($)	Jan. 01, 2019CAD ($)	Dec. 31, 2018CAD ($)	Dec. 31, 2018USD ($)
Disclosure of detailed information about financial instruments [Line Items]
Cash			$ 74,701			$ 96,626
Accounts receivable			310,204			372,336
Accounts payable and accrued liabilities			$ (199,478)		$ (2,800)	$ (274,489)
Canadian Operations [Member] | Currency Risk [Member]
Disclosure of detailed information about financial instruments [Line Items]
Cash				$ 9,727			$ 957
Accounts receivable				242			482
Accounts payable and accrued liabilities				(17,730)			(20,655)
Net foreign currency exposure				(7,761)			(19,216)
Impact of $0.01 change in the U.S. dollar to Canadian dollar exchange rate on net earnings (loss)	$ (78)	$ (192)
Foreign Operations [Member] | Currency Risk [Member]
Disclosure of detailed information about financial instruments [Line Items]
Cash				41,154			49,302
Accounts receivable				150,873			181,609
Accounts payable and accrued liabilities				(86,324)			(122,417)
Long-term liabilities, excluding long-term incentive plans				(7,669)			(7,747)
Net foreign currency exposure				$ 98,034			$ 100,747
Impact of $0.01 change in the U.S. dollar to Canadian dollar exchange rate on comprehensive loss	$ 980	$ 1,007

Summary of Contractual Maturiti

Summary of Contractual Maturities of Financial Liabilities and Other Contractual Commitments (Detail) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019CAD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018CAD ($)	Dec. 31, 2018USD ($)
Disclosure of Nonderivative Financial Instruments [Line Items]
Long-term debt, gross	$ 1,445,127	$ 1,112,895	$ 1,729,351	$ 1,266,729
2020 [Member]
Disclosure of Nonderivative Financial Instruments [Line Items]
Long-term debt, gross	117,678
2023 [Member]
Disclosure of Nonderivative Financial Instruments [Line Items]
Long-term debt, gross	447,792
Liquidity risk [Member]
Disclosure of Nonderivative Financial Instruments [Line Items]
Accounts payable and accrued liabilities	199,478
Share based compensation	17,805
Long-term debt, gross	1,445,127
Interest on long-term debt	457,148
Commitments	169,211
Total	2,288,769
Liquidity risk [Member] | 2020 [Member]
Disclosure of Nonderivative Financial Instruments [Line Items]
Accounts payable and accrued liabilities	199,478
Share based compensation	5,130
Long-term debt, gross	32,463
Interest on long-term debt	95,427
Commitments	36,812
Total	369,310
Liquidity risk [Member] | 2022 [Member]
Disclosure of Nonderivative Financial Instruments [Line Items]
Share based compensation	6,649
Long-term debt, gross	85,215
Interest on long-term debt	95,196
Commitments	64,098
Total	251,158
Liquidity risk [Member] | 2023 [Member]
Disclosure of Nonderivative Financial Instruments [Line Items]
Share based compensation	6,026
Interest on long-term debt	89,888
Commitments	45,346
Total	141,260
Liquidity risk [Member] | 2023 [Member]
Disclosure of Nonderivative Financial Instruments [Line Items]
Long-term debt, gross	447,792
Interest on long-term debt	88,442
Commitments	6,643
Total	542,877
Liquidity risk [Member] | Later Than Five Years And Not Later Than Six Years
Disclosure of Nonderivative Financial Instruments [Line Items]
Long-term debt, gross	399,545
Interest on long-term debt	52,562
Commitments	5,195
Total	457,302
Liquidity risk [Member] | Thereafter [Member]
Disclosure of Nonderivative Financial Instruments [Line Items]
Long-term debt, gross	480,112
Interest on long-term debt	35,633
Commitments	11,117
Total	$ 526,862

Summary of Contractual Maturi_2

Summary of Contractual Maturities of Financial Liabilities and Other Contractual Commitments (Parenthetical) (Detail) - 6.5% Senior Notes Due 2021 [Member] $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Disclosure of Nonderivative Financial Instruments [Line Items]
Long term debt interest rate	6.50%
Long term debt maturity year	December 15, 2021
Amount redeemed	$ 75
Liquidity risk [Member]
Disclosure of Nonderivative Financial Instruments [Line Items]
Long term debt interest rate	6.50%
Long term debt maturity year	15-Dec-21
Amount redeemed	$ 25

Capital Management - Summary of

Capital Management - Summary of Capitalization and Ratio (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Capitalisation [Abstract]
Long-term debt	$ 1,427,181	$ 1,706,253
Shareholders’ equity	1,527,432	1,557,752
Total capitalization	$ 2,954,613	$ 3,264,005
Long-term debt to long-term debt plus equity ratio	0.48%	0.52%

Capital Management - Additional

Capital Management - Additional Information (Detail) $ in Thousands	Dec. 31, 2019CAD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018CAD ($)	Dec. 31, 2018USD ($)
Disclosure Of Capitalisation [Line Items]
Cash	$ 74,701		$ 96,626
Senior Credit Facility [Member]
Disclosure Of Capitalisation [Line Items]
Line of credit borrowing capacity		$ 500,000,000		$ 500,000,000
Line of credit outstanding		0
Letters of credit outstanding		25,000,000		28,000,000
Secured Operating Facility [Member]
Disclosure Of Capitalisation [Line Items]
Line of credit borrowing capacity	98,000		101,000
40.0 Million Secured Operating Facilities [Member]
Disclosure Of Capitalisation [Line Items]
Line of credit borrowing capacity	40,000		40,000
Letters of credit outstanding	$ 26,000		$ 28,000
30.0 Million Operating Facilities [member]
Disclosure Of Capitalisation [Line Items]
Line of credit borrowing capacity		30,000,000		30,000,000
Letters of credit outstanding		2,000,000		2,000,000
15.0 Million Secured Operating Facilities [Member]
Disclosure Of Capitalisation [Line Items]
Line of credit borrowing capacity		15,000,000		15,000,000
Line of credit outstanding		$ 0		$ 0

Components of Changes in Non-ca

Components of Changes in Non-cash Working Capital Balances (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Change In Noncash Working Capital Balances [Abstract]
Accounts receivable	$ 51,152	$ (32,709)
Inventory	1,157	(7,504)
Accounts payable and accrued liabilities	(61,376)	23,225
Non cash working capital	(9,067)	(16,988)
Operations	(4,493)	(17,880)
Investments	$ (4,574)	$ 892

Components of Accounts Receivab

Components of Accounts Receivable (Detail) - CAD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable [Abstract]
Trade	$ 211,797	$ 264,589
Accrued trade	32,167	47,426
Prepaids and other	66,240	60,321
Trade and other current receivables	$ 310,204	$ 372,336

Components of Accounts Payable

Components of Accounts Payable and Accrued Liabilities (Detail) - CAD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Accounts Payable And Accrued Liabilities1 [Abstract]
Accounts payable	$ 91,468		$ 129,493
Accrued liabilities:
Payroll	54,334		73,682
Other	53,676		71,314
Accounts payable and accrued liabilities	$ 199,478	$ 2,800	$ 274,489

Supplemental Information - Addi

Supplemental Information - Additional Information (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Supplemental Information [Line Items]
Operating expense	$ 1,038,967	$ 1,067,264
General and administrative expense	104,010	111,830
Depreciation and amortization gain on asset disposal loss on asset decommissioning and reversal of impairment of property plant and equipment [Member]
Supplemental Information [Line Items]
Operating expense	282,000	358,000
General and administrative expense	$ 15,000	$ 7,000

Summary of Operating and Genera

Summary of Operating and General and Administrative Expenses (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Expense By Nature [Abstract]
Wages, salaries and benefits	$ 697,935	$ 728,101
Purchased materials, supplies and services	429,365	422,359
Share based compensation	22,115	15,598
Operating and general and administrative expenses	1,149,415	1,166,058
Allocated to:
Operating expense	1,038,967	1,067,264
General and administrative	104,010	111,830
Restructuring	6,438	1,164
Other recoveries		(14,200)
Operating and general and administrative expenses	$ 1,149,415	$ 1,166,058

Contingencies and Guarantees -

Contingencies and Guarantees - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019CAD ($)
Tax contingent liability [Member]
Disclosure of contingent liabilities [Line Items]
Disclosure of uncertainties of contingent liabilities	The business and operations of the Corporation are complex and the Corporation has executed a number of significant financings, business combinations, acquisitions and dispositions over the course of its history. The computation of income taxes payable as a result of these transactions involves many complex factors as well as the Corporation’s interpretation of relevant tax legislation and regulations. The Corporation’s management believes that the provision for income tax is adequate and in accordance with IFRS and applicable legislation and regulations. However, there are tax filing positions that have been and can still be the subject of review by taxation authorities who may successfully challenge the Corporation’s interpretation of the applicable tax legislation and regulations, with the result that additional taxes could be payable by the Corporation.
Legal proceedings contingent liability [Member]
Disclosure of contingent liabilities [Line Items]
Disclosure of uncertainties of contingent liabilities	The Corporation, through the performance of its services, product sales and business arrangements, is sometimes named as a defendant in litigation. The outcome of such claims against the Corporation is not determinable at this time; however, their ultimate resolution is not expected to have a material adverse effect on the Corporation.
Other contingent liabilities [Member]
Disclosure of contingent liabilities [Line Items]
Disclosure not practicable	The Corporation has entered into agreements indemnifying certain parties primarily with respect to tax and specific third-party claims associated with businesses sold by the Corporation. Due to the nature of the indemnifications, the maximum exposure under these agreements cannot be estimated. No amounts have been recorded for the indemnities as the Corporation’s obligations under them are not probable or estimable.
Obligation amount	$ 0

Condensed Consolidated Statemen

Condensed Consolidated Statement of Financial Position (Detail) - CAD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash	$ 74,701		$ 96,626
Other current assets	343,064		406,417
Property, plant and equipment	2,749,463		3,038,612
Intangibles	31,746		35,401
Right of use assets	66,142	$ 73,464	0
Other long-term assets	4,724		39,329
Total assets	3,269,840		3,636,043
Assets held for sale			19,658
Liabilities and shareholders’ equity
Current liabilities	216,069		282,162
Long-term debt	1,427,181		1,706,253
Lease obligation	54,980
Other long-term liabilities	44,178		89,876
Total liabilities	1,742,408		2,078,291
Shareholders’ equity	1,527,432		1,557,752	$ 1,810,336
Total liabilities and shareholders’ equity	3,269,840		3,636,043
Guarantor Subsidiaries [Member]
Assets
Cash	20,651		37,138
Other current assets	242,968		308,450
Intercompany receivables	2,205,834		1,887,405
Investments in subsidiaries	30		68
Property, plant and equipment	2,263,355		2,541,060
Intangibles	1,312		1,853
Right of use assets	39,267
Other long-term assets			46,620
Total assets	4,773,417		4,842,252
Assets held for sale			19,658
Liabilities and shareholders’ equity
Current liabilities	130,232		190,239
Intercompany payables and debt	84,901		60,101
Lease obligation	31,614
Other long-term liabilities	18,454		13,160
Total liabilities	265,201		263,500
Shareholders’ equity	4,508,216		4,578,752
Total liabilities and shareholders’ equity	4,773,417		4,842,252
Non-Guarantor Subsidiaries [Member]
Assets
Cash	33,098		30,862
Other current assets	96,140		93,166
Intercompany receivables	67,377		80,735
Property, plant and equipment	437,413		441,509
Right of use assets	3,805
Other long-term assets	6,595		5,479
Total assets	644,428		651,751
Liabilities and shareholders’ equity
Current liabilities	51,975		49,712
Intercompany payables and debt	52,621		41,349
Lease obligation	2,489
Other long-term liabilities	668		503
Total liabilities	107,753		91,564
Shareholders’ equity	536,675		560,187
Total liabilities and shareholders’ equity	644,428		651,751
Consolidating Adjustments [Member]
Assets
Other current assets	4		3
Intercompany receivables	(2,355,312)		(2,019,756)
Investments in subsidiaries	(4,535,655)		(4,523,032)
Property, plant and equipment	279		613
Other long-term assets	(1,871)		(12,770)
Total assets	(6,892,555)		(6,554,942)
Liabilities and shareholders’ equity
Intercompany payables and debt	(2,355,312)		(2,019,756)
Other long-term liabilities	(1,871)		(12,770)
Total liabilities	(2,357,183)		(2,032,526)
Shareholders’ equity	(4,535,372)		(4,522,416)
Total liabilities and shareholders’ equity	(6,892,555)		(6,554,942)
Parent [member]
Assets
Cash	20,952		28,626
Other current assets	3,952		4,798
Intercompany receivables	82,101		51,616
Investments in subsidiaries	4,535,625		4,522,964
Property, plant and equipment	48,416		55,430
Intangibles	30,434		33,548
Right of use assets	23,070
Total assets	4,744,550		4,696,982
Liabilities and shareholders’ equity
Current liabilities	33,862		42,211
Intercompany payables and debt	2,217,790		1,918,306
Long-term debt	1,427,181		1,706,253
Lease obligation	20,877
Other long-term liabilities	26,927		88,983
Total liabilities	3,726,637		3,755,753
Shareholders’ equity	1,017,913		941,229
Total liabilities and shareholders’ equity	$ 4,744,550		$ 4,696,982

Condensed Consolidated Statem_2

Condensed Consolidated Statement of Net Earnings (Loss) (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of subsidiaries [Line Items]
Revenue	$ 1,541,320	$ 1,541,189
Operating expense	1,038,967	1,067,264
General and administrative expense	104,010	111,830
Restructuring	6,438	1,164
Other recoveries		(14,200)
Earnings before income taxes, gain on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of goodwill, reversal of impairment of property, plant and equipment, loss on asset decommissioning, gain on asset disposals and depreciation and amortization	391,905	375,131
Depreciation and amortization	333,616	377,044
Gain on asset disposals	(50,741)	(11,384)
Impairment of goodwill		207,544
Loss on asset decommissioning	20,263
Reversal of impairment of property, plant and equipment	(5,810)
Foreign exchange	(8,722)	4,017
Finance charges	118,453	127,178
Gain on redemption and repurchase of unsecured senior notes	(6,815)	(5,672)
Loss before income taxes	(8,339)	(323,596)
Income taxes	(14,957)	(29,326)
Net earnings (loss)	6,618	(294,270)
Guarantor Subsidiaries [Member]
Disclosure of subsidiaries [Line Items]
Revenue	1,341,624	1,356,913
Operating expense	909,898	949,451
General and administrative expense	57,119	48,748
Restructuring	3,616	1,164
Earnings before income taxes, gain on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of goodwill, reversal of impairment of property, plant and equipment, loss on asset decommissioning, gain on asset disposals and depreciation and amortization	370,991	357,550
Depreciation and amortization	262,914	304,070
Gain on asset disposals	(50,439)	(6,051)
Impairment of goodwill		207,544
Loss on asset decommissioning	20,263
Reversal of impairment of property, plant and equipment	(5,810)
Foreign exchange	(758)	(443)
Finance charges	(354)	(233)
Loss before income taxes	145,175	(147,337)
Income taxes	44,809	13,863
Net earnings (loss)	100,366	(161,200)
Non-Guarantor Subsidiaries [Member]
Disclosure of subsidiaries [Line Items]
Revenue	210,292	191,131
Operating expense	139,701	124,689
General and administrative expense	8,473	10,444
Earnings before income taxes, gain on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of goodwill, reversal of impairment of property, plant and equipment, loss on asset decommissioning, gain on asset disposals and depreciation and amortization	62,118	55,998
Depreciation and amortization	57,205	60,562
Gain on asset disposals	(255)	(19)
Foreign exchange	535	(359)
Finance charges	32	653
Loss before income taxes	4,601	(4,839)
Income taxes	2,853	2,936
Net earnings (loss)	1,748	(7,775)
Consolidating Adjustments [Member]
Disclosure of subsidiaries [Line Items]
Revenue	(10,688)	(6,959)
Operating expense	(10,688)	(6,959)
Depreciation and amortization	225	216
Equity in earnings (loss) of subsidiaries	102,114	(168,975)
Loss before income taxes	(102,339)	168,759
Net earnings (loss)	(102,339)	168,759
Parent [member]
Disclosure of subsidiaries [Line Items]
Revenue	92	104
Operating expense	56	83
General and administrative expense	38,418	52,638
Restructuring	2,822
Other recoveries		(14,200)
Earnings before income taxes, gain on redemption and repurchase of unsecured senior notes, finance charges, foreign exchange, impairment of goodwill, reversal of impairment of property, plant and equipment, loss on asset decommissioning, gain on asset disposals and depreciation and amortization	(41,204)	(38,417)
Depreciation and amortization	13,272	12,196
Gain on asset disposals	(47)	(5,314)
Foreign exchange	(8,499)	4,819
Finance charges	118,775	126,758
Gain on redemption and repurchase of unsecured senior notes	(6,815)	(5,672)
Equity in earnings (loss) of subsidiaries	(102,114)	168,975
Loss before income taxes	(55,776)	(340,179)
Income taxes	(62,619)	(46,125)
Net earnings (loss)	$ 6,843	$ (294,054)

Condensed Consolidated Statem_3

Condensed Consolidated Statement of Comprehensive Income (Loss) (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of subsidiaries [Line Items]
Net earnings	$ 6,618	$ (294,270)
Other comprehensive income (loss)	(27,759)	30,404
Comprehensive loss	(21,141)	(263,866)
Guarantor Subsidiaries [Member]
Disclosure of subsidiaries [Line Items]
Net earnings	100,366	(161,200)
Other comprehensive income (loss)	(79,018)	129,804
Comprehensive loss	21,348	(31,396)
Non-Guarantor Subsidiaries [Member]
Disclosure of subsidiaries [Line Items]
Net earnings	1,748	(7,775)
Other comprehensive income (loss)	(27,655)	45,190
Comprehensive loss	(25,907)	37,415
Consolidating Adjustments [Member]
Disclosure of subsidiaries [Line Items]
Net earnings	(102,339)	168,759
Other comprehensive income (loss)	(108)	636
Comprehensive loss	(102,447)	169,395
Parent [member]
Disclosure of subsidiaries [Line Items]
Net earnings	6,843	(294,054)
Other comprehensive income (loss)	79,022	(145,226)
Comprehensive loss	$ 85,865	$ (439,280)

Condensed Consolidated Statem_4

Condensed Consolidated Statement of Cash Flow (Detail) - CAD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of subsidiaries [Line Items]
Operations	$ 288,159	$ 293,334
Investments	(74,500)	(100,794)
Financing	(231,814)	(169,085)
Effect of exchange rate changes on cash and cash equivalents	(3,770)	8,090
Increase (decrease) in cash and cash equivalents	(21,925)	31,545
Cash and cash equivalents, beginning of year	96,626	65,081
Cash and cash equivalents, end of year	74,701	96,626
Guarantor Subsidiaries [Member]
Disclosure of subsidiaries [Line Items]
Operations	480,215	351,782
Investments	(56,937)	(75,740)
Financing	(438,350)	(247,017)
Effect of exchange rate changes on cash and cash equivalents	(1,415)	2,691
Increase (decrease) in cash and cash equivalents	(16,487)	31,716
Cash and cash equivalents, beginning of year	37,138	5,422
Cash and cash equivalents, end of year	20,651	37,138
Non-Guarantor Subsidiaries [Member]
Disclosure of subsidiaries [Line Items]
Operations	(2,680)	44,453
Investments	(15,337)	(16,253)
Financing	21,936	(39,285)
Effect of exchange rate changes on cash and cash equivalents	(1,683)	3,131
Increase (decrease) in cash and cash equivalents	2,236	(7,954)
Cash and cash equivalents, beginning of year	30,862	38,816
Cash and cash equivalents, end of year	33,098	30,862
Consolidating Adjustments [Member]
Disclosure of subsidiaries [Line Items]
Investments	(410,979)	(286,302)
Financing	410,979	286,302
Parent [member]
Disclosure of subsidiaries [Line Items]
Operations	(189,376)	(102,901)
Investments	408,753	277,501
Financing	(226,379)	(169,085)
Effect of exchange rate changes on cash and cash equivalents	(672)	2,268
Increase (decrease) in cash and cash equivalents	(7,674)	7,783
Cash and cash equivalents, beginning of year	28,626	20,843
Cash and cash equivalents, end of year	$ 20,952	$ 28,626

Summary of Subsidiaries (Detail

Summary of Subsidiaries (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Precision Limited Partnership [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	Canada
Ownership Interest	100.00%	100.00%
Precision Drilling Canada Limited Partnership [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	Canada
Ownership Interest	100.00%	100.00%
Precision Diversified Oilfield Services Corp [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	Canada
Ownership Interest	100.00%	100.00%
Precision Directional Services Ltd [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	Canada
Ownership Interest	100.00%	100.00%
Precision Drilling (US) Corporation [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	United States
Ownership Interest	100.00%	100.00%
Precision Drilling Holdings Company [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	United States
Ownership Interest	100.00%	100.00%
Precision Drilling Company LP [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	United States
Ownership Interest	100.00%	100.00%
Precision Completion and Production Services Ltd [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	United States
Ownership Interest	100.00%	100.00%
Precision Directional Services Inc [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	United States
Ownership Interest	100.00%	100.00%
Grey Wolf Drilling Limited [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	Barbados
Ownership Interest	100.00%	100.00%
Grey Wolf Drilling Barbados Ltd [Member]
Disclosure of subsidiaries [Line Items]
Country of incorporation	Barbados
Ownership Interest	100.00%	100.00%