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Goodwill and Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2010
Goodwill And Intangible Assets Disclosure [Line Items]
Accumulated impairment losses	$ 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss	$ 0us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Goodwill impairment, long-term growth rate		3.00%us-gaap_FairValueInputsLongTermRevenueGrowthRate
Amortization expense	3,643us-gaap_AmortizationOfIntangibleAssets	3,993us-gaap_AmortizationOfIntangibleAssets	4,110us-gaap_AmortizationOfIntangibleAssets
Non-compete Agreement
Goodwill And Intangible Assets Disclosure [Line Items]
Contract term				3 years
Amortization period (in years)		3 years
Amortization expense		350us-gaap_AmortizationOfIntangibleAssets / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember	467us-gaap_AmortizationOfIntangibleAssets / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember
Customer Relationships
Goodwill And Intangible Assets Disclosure [Line Items]
Amortization period (in years)	7 years
Amortization expense	$ 3,600us-gaap_AmortizationOfIntangibleAssets / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember	$ 3,600us-gaap_AmortizationOfIntangibleAssets / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember	$ 3,600us-gaap_AmortizationOfIntangibleAssets / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember
Contract Drilling
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill impairment, discount rate		11.87%us-gaap_FairValueInputsDiscountForLackOfMarketability / us-gaap_StatementBusinessSegmentsAxis = pten_ContractDrillingMember
Pressure Pumping
Goodwill And Intangible Assets Disclosure [Line Items]
Goodwill impairment, discount rate		12.40%us-gaap_FairValueInputsDiscountForLackOfMarketability / us-gaap_StatementBusinessSegmentsAxis = pten_PressurePumpingMember

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

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- Definition

Adjustment to the discount rate used to measure fair value for lack of ability to convert business interests into cash quickly.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Percentage of assumed long-term growth in revenues, used as an input to measure fair value.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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