XML 111 R74.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Value of Stock Settled Performance Units (Detail) (Performance Units Awards, USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
2014
  
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Performance Options [Line Items]  
Aggregate fair value at date of grant $ 5,388pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards
/ us-gaap_AwardDateAxis
= pten_YearTwentyFourteenMember
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
2013
  
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Performance Options [Line Items]  
Aggregate fair value at date of grant 5,564pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards
/ us-gaap_AwardDateAxis
= pten_YearTwentyThirteenMember
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
2012
  
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Performance Options [Line Items]  
Aggregate fair value at date of grant 3,065pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards
/ us-gaap_AwardDateAxis
= pten_YearTwentyTwelveMember
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
2011
  
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Performance Options [Line Items]  
Aggregate fair value at date of grant 5,569pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards
/ us-gaap_AwardDateAxis
= pten_YearTwentyElevenMember
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
2010
  
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Performance Options [Line Items]  
Aggregate fair value at date of grant $ 3,117pten_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantDateFairValueOfAwards
/ us-gaap_AwardDateAxis
= pten_YearTwentyTenMember
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember