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Business Segments - Revenues (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |
Total operating revenues | $ 657,699 us-gaap_SalesRevenueNet |  | $ 678,168 us-gaap_SalesRevenueNet |
Operating Segments |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |
Total operating revenues | 658,462 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |  | 679,226 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember |
Operating Segments | Contract Drilling |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |
Total operating revenues | 402,241 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_ContractDrillingMember |  | 426,961 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_ContractDrillingMember |
Operating Segments | Pressure Pumping |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |
Total operating revenues | 249,721 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_PressurePumpingMember |  | 240,261 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_PressurePumpingMember |
Operating Segments | Oil And Natural Gas |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |
Total operating revenues | 6,500 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_OilAndNaturalGasMember |  | 12,004 us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = pten_OilAndNaturalGasMember |
Intersegment Elimination |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |
Total operating revenues | $ (763)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember | [1] | $ (1,058)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember | [1]
[1] | Consists of contract drilling intercompany revenues for services provided to the oil and natural gas exploration and production segment.

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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