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Stock-Settled Performance Units (Detail)	6 Months Ended
	Jun. 30, 2014
Performance Unit Awards 2014
Schedule of Share based Compensation Arrangements by Share based Payment Award, Performance Options [Line Items]
Target number of shares	154,000
Performance Unit Awards 2013
Schedule of Share based Compensation Arrangements by Share based Payment Award, Performance Options [Line Items]
Target number of shares	236,500
Performance Unit Awards 2012
Schedule of Share based Compensation Arrangements by Share based Payment Award, Performance Options [Line Items]
Target number of shares	192,000
Performance Unit Awards 2011
Schedule of Share based Compensation Arrangements by Share based Payment Award, Performance Options [Line Items]
Target number of shares	144,375

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- Definition

Performance award, target number of shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	pten_
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Balance Type:	na
Period Type:	duration

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- Details

Name:	pten_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardPerformanceOptionsLineItems
Namespace Prefix:	pten_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration