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CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Operating revenues:    
Total operating revenues $ 657,699us-gaap_SalesRevenueNet $ 678,168us-gaap_SalesRevenueNet
Operating costs and expenses:    
Contract drilling 212,810pten_ContractDrillingExpenses 251,059pten_ContractDrillingExpenses
Pressure pumping 212,725pten_PressurePumpingOperatingCost 199,808pten_PressurePumpingOperatingCost
Oil and natural gas 2,798us-gaap_OilAndGasProductionExpense 3,274us-gaap_OilAndGasProductionExpense
Depreciation, depletion, amortization and impairment 175,382pten_DepreciationDepletionAmortizationAndImpairment 147,322pten_DepreciationDepletionAmortizationAndImpairment
Selling, general and administrative 32,797us-gaap_SellingGeneralAndAdministrativeExpense 19,673us-gaap_SellingGeneralAndAdministrativeExpense
Net gain on asset disposals (2,916)us-gaap_GainLossOnSaleOfPropertyPlantEquipment [1] (1,744)us-gaap_GainLossOnSaleOfPropertyPlantEquipment [1]
Total operating costs and expenses 633,596us-gaap_CostsAndExpenses 619,392us-gaap_CostsAndExpenses
Operating income 24,103us-gaap_OperatingIncomeLoss 58,776us-gaap_OperatingIncomeLoss
Other income (expense):    
Interest income 283us-gaap_InvestmentIncomeInterest 176us-gaap_InvestmentIncomeInterest
Interest expense, net of amount capitalized (8,541)us-gaap_InterestExpense (7,188)us-gaap_InterestExpense
Total other expense (8,258)us-gaap_NonoperatingIncomeExpense (7,012)us-gaap_NonoperatingIncomeExpense
Income before income taxes 15,845us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 51,764us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income tax expense (benefit):    
Current 30,520us-gaap_CurrentIncomeTaxExpenseBenefit 26,935us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred (23,800)us-gaap_DeferredIncomeTaxExpenseBenefit (9,993)us-gaap_DeferredIncomeTaxExpenseBenefit
Total income tax expense 6,720us-gaap_IncomeTaxExpenseBenefit 16,942us-gaap_IncomeTaxExpenseBenefit
Net income 9,125us-gaap_ProfitLoss 34,822us-gaap_ProfitLoss
Net income per common share:    
Basic $ 0.06us-gaap_EarningsPerShareBasic $ 0.24us-gaap_EarningsPerShareBasic
Diluted $ 0.06us-gaap_EarningsPerShareDiluted $ 0.24us-gaap_EarningsPerShareDiluted
Weighted average number of common shares outstanding:    
Basic 144,983us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 142,892us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted 145,745us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 145,099us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Cash dividends per common share $ 0.10us-gaap_CommonStockDividendsPerShareCashPaid $ 0.10us-gaap_CommonStockDividendsPerShareCashPaid
Contract Drilling    
Operating revenues:    
Oil and gas services 401,478us-gaap_RevenueOilAndGasServices
/ us-gaap_StatementBusinessSegmentsAxis
= pten_ContractDrillingMember		 425,903us-gaap_RevenueOilAndGasServices
/ us-gaap_StatementBusinessSegmentsAxis
= pten_ContractDrillingMember
Pressure Pumping    
Operating revenues:    
Oil and gas services 249,721us-gaap_RevenueOilAndGasServices
/ us-gaap_StatementBusinessSegmentsAxis
= pten_PressurePumpingMember		 240,261us-gaap_RevenueOilAndGasServices
/ us-gaap_StatementBusinessSegmentsAxis
= pten_PressurePumpingMember
Oil And Natural Gas    
Operating revenues:    
Oil and natural gas $ 6,500us-gaap_OilAndGasSalesRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= pten_OilAndNaturalGasMember		 $ 12,004us-gaap_OilAndGasSalesRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= pten_OilAndNaturalGasMember
[1] Net gains or losses associated with the disposal of assets relate to corporate strategy decisions of the executive management group. Accordingly, the related gains or losses have been separately presented and excluded from the results of specific segments.