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Summary of Purchase Price Allocation (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Goodwill	$ 210,795us-gaap_Goodwill	$ 153,809us-gaap_Goodwill	$ 153,809us-gaap_Goodwill
Pressure Pumping Acquisitions
Business Acquisition [Line Items]
Inventory	1,357us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = pten_PressurePumpingAcquisitionsMember
Equipment	117,958us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEquipment / us-gaap_BusinessAcquisitionAxis = pten_PressurePumpingAcquisitionsMember
Goodwill	56,986us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = pten_PressurePumpingAcquisitionsMember
Total purchase price	$ 176,301us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = pten_PressurePumpingAcquisitionsMember

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Amount of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment, acquired at the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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

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