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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Operating revenues:      
Total operating revenues $ 3,182,291us-gaap_SalesRevenueNet $ 2,716,034us-gaap_SalesRevenueNet $ 2,723,414us-gaap_SalesRevenueNet
Operating costs and expenses:      
Contract drilling 1,066,659pten_ContractDrillingExpenses 968,754pten_ContractDrillingExpenses 1,075,491pten_ContractDrillingExpenses
Pressure pumping 1,036,310pten_PressurePumpingOperatingCost 744,243pten_PressurePumpingOperatingCost 580,878pten_PressurePumpingOperatingCost
Oil and natural gas 13,102us-gaap_OilAndGasProductionExpense 12,909us-gaap_OilAndGasProductionExpense 11,303us-gaap_OilAndGasProductionExpense
Depreciation, depletion, amortization and impairment 718,730pten_DepreciationDepletionAmortizationAndImpairment 597,469pten_DepreciationDepletionAmortizationAndImpairment 526,614pten_DepreciationDepletionAmortizationAndImpairment
Selling, general and administrative 80,145us-gaap_SellingGeneralAndAdministrativeExpense 73,852us-gaap_SellingGeneralAndAdministrativeExpense 64,473us-gaap_SellingGeneralAndAdministrativeExpense
Net gain on asset disposals (15,781)us-gaap_GainLossOnSaleOfPropertyPlantEquipment [1] (3,384)us-gaap_GainLossOnSaleOfPropertyPlantEquipment [1] (33,806)us-gaap_GainLossOnSaleOfPropertyPlantEquipment [1]
Provision for bad debts 0us-gaap_ProvisionForDoubtfulAccounts 0us-gaap_ProvisionForDoubtfulAccounts 1,100us-gaap_ProvisionForDoubtfulAccounts
Total operating costs and expenses 2,899,165us-gaap_CostsAndExpenses 2,393,843us-gaap_CostsAndExpenses 2,226,053us-gaap_CostsAndExpenses
Operating income 283,126us-gaap_OperatingIncomeLoss 322,191us-gaap_OperatingIncomeLoss 497,361us-gaap_OperatingIncomeLoss
Other income (expense):      
Interest income 979us-gaap_InvestmentIncomeInterest 918us-gaap_InvestmentIncomeInterest 554us-gaap_InvestmentIncomeInterest
Interest expense, net of amount capitalized (29,825)us-gaap_InterestExpense (28,359)us-gaap_InterestExpense (22,750)us-gaap_InterestExpense
Other 3us-gaap_OtherNonoperatingIncomeExpense 1,691us-gaap_OtherNonoperatingIncomeExpense 508us-gaap_OtherNonoperatingIncomeExpense
Total other expense (28,843)us-gaap_NonoperatingIncomeExpense (25,750)us-gaap_NonoperatingIncomeExpense (21,688)us-gaap_NonoperatingIncomeExpense
Income before income taxes 254,283us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 296,441us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 475,673us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income tax expense:      
Current 47,946us-gaap_CurrentIncomeTaxExpenseBenefit 57,863us-gaap_CurrentIncomeTaxExpenseBenefit 15,760us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred 43,673us-gaap_DeferredIncomeTaxExpenseBenefit 50,569us-gaap_DeferredIncomeTaxExpenseBenefit 160,436us-gaap_DeferredIncomeTaxExpenseBenefit
Total income tax expense 91,619us-gaap_IncomeTaxExpenseBenefit 108,432us-gaap_IncomeTaxExpenseBenefit 176,196us-gaap_IncomeTaxExpenseBenefit
Net income 162,664us-gaap_ProfitLoss 188,009us-gaap_ProfitLoss 299,477us-gaap_ProfitLoss
Net income per common share:      
Basic $ 1.12us-gaap_EarningsPerShareBasic $ 1.29us-gaap_EarningsPerShareBasic $ 1.96us-gaap_EarningsPerShareBasic
Diluted $ 1.11us-gaap_EarningsPerShareDiluted $ 1.28us-gaap_EarningsPerShareDiluted $ 1.96us-gaap_EarningsPerShareDiluted
Weighted average number of common shares outstanding:      
Basic 144,066us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 144,356us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 151,144us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted 145,376us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 145,303us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 151,699us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Cash dividends per common share $ 0.40us-gaap_CommonStockDividendsPerShareCashPaid $ 0.20us-gaap_CommonStockDividendsPerShareCashPaid $ 0.20us-gaap_CommonStockDividendsPerShareCashPaid
Contract Drilling      
Operating revenues:      
Oil and gas services 1,838,830us-gaap_RevenueOilAndGasServices
/ us-gaap_StatementBusinessSegmentsAxis
= pten_ContractDrillingMember		 1,679,611us-gaap_RevenueOilAndGasServices
/ us-gaap_StatementBusinessSegmentsAxis
= pten_ContractDrillingMember		 1,821,713us-gaap_RevenueOilAndGasServices
/ us-gaap_StatementBusinessSegmentsAxis
= pten_ContractDrillingMember
Pressure Pumping      
Operating revenues:      
Oil and gas services 1,293,265us-gaap_RevenueOilAndGasServices
/ us-gaap_StatementBusinessSegmentsAxis
= pten_PressurePumpingMember		 979,166us-gaap_RevenueOilAndGasServices
/ us-gaap_StatementBusinessSegmentsAxis
= pten_PressurePumpingMember		 841,771us-gaap_RevenueOilAndGasServices
/ us-gaap_StatementBusinessSegmentsAxis
= pten_PressurePumpingMember
Oil And Natural Gas      
Operating revenues:      
Oil and natural gas $ 50,196us-gaap_OilAndGasSalesRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= pten_OilAndNaturalGasMember		 $ 57,257us-gaap_OilAndGasSalesRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= pten_OilAndNaturalGasMember		 $ 59,930us-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.