XML 81 R67.htm IDEA: XBRL DOCUMENT
v3.20.4

Long Term Debt - Senior Notes - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 16, 2019 | Nov. 15, 2019 | Sep. 25, 2019 | Mar. 27, 2018 | Jan. 19, 2018 | Jun. 14, 2012 | Oct. 05, 2010 | Dec. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Sep. 27, 2012
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on early extinguishment |  |  |  |  |  |  |  |  |  |  | $ 3,596 | $ (24,023) |  |
Repayment of borrowings |  |  |  |  |  |  |  |  |  |  |  |  | $ 347,000 |
Proceeds from borrowings, before offering expenses |  |  |  |  |  |  |  |  |  |  |  |  | 79,000 |
Interest expense related to amortization of debt issuance costs |  |  |  |  |  |  |  |  |  |  | 1,100 | $ 2,000 | 2,000 |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of borrowings |  |  |  |  | $ 239,000 |  |  |  |  |  |  |  |  |
4.97% Series A Senior Notes, Due October 5th 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, aggregate principal amount |  |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |
Debt interest rate |  |  |  |  |  |  | 4.97% |  |  |  |  |  |  |
Notes issuance date |  |  |  |  |  |  | Oct. 05, 2010 |  |  |  |  |  |  |
Debt Instrument principle including make-whole premium |  |  | $ 308,000 |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption percentage |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on early extinguishment |  |  |  |  |  |  |  |  |  | $ (8,200) |  |  |  |
Debt issuance costs |  |  |  |  |  |  | $ 1,900 |  |  |  |  |  |  |
Interest expense related to amortization of debt issuance costs |  |  |  |  |  |  |  |  |  |  | 200 |  |  |
4.27% Series B Senior Notes, Due June 14th 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, aggregate principal amount |  |  |  |  |  | $ 300,000 |  |  |  |  |  |  |  |
Debt interest rate |  |  |  |  |  | 4.27% |  |  |  |  |  |  |  |
Debt Instrument principle including make-whole premium | $ 315,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, redemption percentage | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Debt maturity date |  |  |  |  |  | Jun. 14, 2012 |  |  |  |  |  |  |  |
Gain (Loss) on early extinguishment |  |  |  |  |  |  |  |  | $ (15,800) |  |  |  |  |
Debt issuance costs |  |  |  |  |  | $ 1,600 |  |  |  |  |  |  |  |
Interest expense related to amortization of debt issuance costs |  |  |  |  |  |  |  |  |  |  | $ 400 |  |  |
3.95% Senior Notes Due 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, aggregate principal amount |  |  |  |  | $ 525,000 |  |  |  |  |  |  |  |  |
Debt interest rate |  |  |  |  | 3.95% |  |  | 3.95% | 3.95% |  | 3.95% | 3.95% |  |
Debt instrument, redemption percentage |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |
Debt maturity date |  |  |  |  | Feb. 01, 2028 |  |  |  |  |  |  |  |  |
Proceeds from borrowings, before offering expenses |  |  |  |  | $ 521,000 |  |  |  |  |  |  |  |  |
Debt payment term |  |  |  |  |  |  |  |  |  |  | We pay interest on the 2028 Notes on February 1 and August 1 of each year. |  |  |
Debt instrument redemption description |  |  |  |  |  |  |  |  |  |  | At our option, we may redeem the Senior Notes in whole or in part, at any time or from time to time at a redemption price equal to 100% of the principal amount of such Senior Notes to be redeemed, plus accrued and unpaid interest, if any, on those Senior Notes to the redemption date, plus a “make-whole” premium. Additionally, commencing on November 1, 2027, in the case of the 2028 Notes, and on August 15, 2029, in the case of the 2029 Notes, at our option, we may redeem the respective Senior Notes in whole or in part, at a redemption price equal to 100% of the principal amount of the Senior Notes to be redeemed, plus accrued and unpaid interest, if any, on those Senior Notes to the redemption date. |  |  |
Debt instrument redemption upon the occurrence of change of control, description |  |  |  |  |  |  |  |  |  |  | Upon the occurrence of a change of control triggering event, as defined in the indentures, each holder of the Senior Notes may require us to purchase all or a portion of such holder’s Senior Notes at a price equal to 101% of their principal amount, plus accrued and unpaid interest, if any, to, but excluding, the repurchase date. |  |  |
Redemption price percentage of principal amount of debt instrument on change of control |  |  |  |  | 101.00% |  |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  | $ 1,600 |  |  |  |  |  |  |  |  |
5.15% Senior Notes Due 2029 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, aggregate principal amount |  | $ 350,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt interest rate |  | 5.15% |  |  |  |  |  | 5.15% | 5.15% |  | 5.15% | 5.15% |  |
Debt maturity date |  | Nov. 15, 2029 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from borrowings, before offering expenses |  | $ 347,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt payment term |  |  |  |  |  |  |  |  |  |  | We pay interest on the 2029 Notes on May 15 and November 15 of each year. |  |  |
Debt issuance costs |  | 1,000 |  |  |  |  |  |  |  |  |  |  |  |
Term Loan Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of borrowings |  | $ 50,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  |  |  |  | $ 200 |  |  | $ 200 |  |  |
Interest expense related to amortization of debt issuance costs |  |  |  |  |  |  |  |  |  |  | 100 |  |  |
2028 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on early extinguishment |  |  |  |  |  |  |  | 3,400 |  |  |  |  |  |
Debt instrument, repurchase amount |  |  |  |  |  |  |  | 15,500 |  |  | 15,500 |  |  |
2029 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on early extinguishment |  |  |  |  |  |  |  | 200 |  |  |  |  |  |
Debt instrument, repurchase amount |  |  |  |  |  |  |  | 800 |  |  | 800 |  |  |
Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,600
Credit Agreement | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt maturity date |  |  |  | Mar. 27, 2023 |  |  |  |  |  |  |  |  |  |
Previous Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense related to amortization of debt issuance costs |  |  |  |  |  |  |  |  |  |  |  |  | $ 300 |
Amendment No. 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  |  |  |  |  |  |  | $ 400 |  |  | 400 |  |  |
Early redemption of 2028 Notes and 2029 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense related to amortization of debt issuance costs |  |  |  |  |  |  |  |  |  |  | $ 100 |  |  |

X
- Definition Debt instrument principle including make-whole premium. + References No definition available. + Details
Name: | pten_DebtInstrumentPrincipleIncludingMakeWholePremium
Namespace Prefix: | pten_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Debt instrument redemption price percentage on change of control. + References No definition available. + Details
Name: | pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControl
Namespace Prefix: | pten_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt instrument redemption price percentage on change of control, description. + References No definition available. + Details
Name: | pten_DebtInstrumentRedemptionPricePercentageOnChangeOfControlDescription
Namespace Prefix: | pten_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
Name: | us-gaap_AmortizationOfFinancingCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Date the debt instrument was issued, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentIssuanceDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentPaymentTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of debt redemption features under terms of the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentRedemptionDescription
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value amount of debt instrument that was repurchased. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromLongTermLinesOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
Name: | us-gaap_RepaymentsOfLongTermLinesOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_SeriesASeniorNotesFourPointNineSevenPercentDueOctoberFiveTwentyTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_SeriesBSeniorNotesFourPointTwoSevenPercentDueJuneFourteenTwentyTwentyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_ThreePointNineFivePercentSeniorNotesDueJanuaryTwoThousandTwentyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_FivePointOneFivePercentSeniorNotesDueNovemberTwoThousandTwentyNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_TermLoanAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_TwoThousandTwentyEightNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_TwoThousandTwentyNineNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_CreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_PreviousCreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_AmendmentNoTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=pten_EarlyRedemptionOf2028NotesAnd2029NotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |