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Stock-based Compensation - Additional Information (Detail) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Apr. 30, 2021 | May 31, 2020 | Apr. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 03, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation expense |  |  |  | $ 750,000 |  |  |
Compensation expense foregoing limit |  |  |  | $ 1,000,000 |  |  |
Number of stock option granted |  |  |  | 0 | 0 | 0 |
Outstanding non-vested restricted stock |  |  |  | 3,300,000 |  |  |
Options outstanding |  |  |  | 3,720,150 | 4,026,150 |  |
Employee Stock Option [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Options outstanding, aggregate intrinsic value |  |  |  | $ 0 |  |  |
weighted-average remaining contractual term |  |  |  | 2 years 5 months 12 days |  |  |
Performance Shares [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Weighted-average remaining vesting period for unvested performance units |  |  |  | 1 year 5 months 8 days |  |  |
Performance period |  |  |  | 3 years |  |  |
Unrecognized compensation cost |  |  |  | $ 6,600,000 |  |  |
Performance Shares [Member] | Year Twenty Sixteen [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation expense |  |  |  |  |  | $ 321,000 |
Shares issued |  |  | 185,000 |  |  |  |
Performance Shares [Member] | Year Twenty Seventeen [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation expense |  |  |  |  | $ 642,000 | 1,927,000 |
Shares issued |  | 332,773 |  |  |  |  |
Performance Shares [Member] | Year Twenty Eighteen [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Compensation expense |  |  |  | 667,000 | 2,668,000 | $ 2,668,000 |
Shares issued | 621,400 |  |  |  |  |  |
Phantom Share Units P S Us [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards vesting period |  | 3 years |  |  |  |  |
Performance completion year |  | 2023 |  |  |  |  |
Grant date fair value |  | $ 1,200,000 |  |  |  |  |
Expense recognized |  |  |  | $ 1,800,000 | $ 600,000 |  |
Award description |  | Mr. Hendricks may earn from 0% to 200% of a target award of 298,500 phantom units based on our achievement of the same performance conditions over the same performance period that applies to the Performance Units granted in April 2020, as described above. Earned Phantom Units, if any, will be settled in 2023, following completion of the three-year performance period, in a cash payment equal to the number of earned phantom units multiplied by our average trading price per share over the twenty consecutive trading days ending March 31, 2023. |  |  |  |  |
Option to Purchase [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Options outstanding |  |  |  | 0 |  |  |
Chief Executive Officer And President [Member] | Phantom Share Units P S Us [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Non-vested restricted stock units outstanding at beginning of year |  | 298,500 |  |  |  |  |
Chief Executive Officer And President [Member] | Maximum [Member] | Phantom Share Units P S Us [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Percentage of target award vesting righ |  | 200.00% |  |  |  |  |
Chief Executive Officer And President [Member] | Minimum [Member] | Phantom Share Units P S Us [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Percentage of target award vesting righ |  | 0.00% |  |  |  |  |
Two Thousand fourteen Long Term Incentive Plan |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Shares available for grant |  |  |  | 0 |  |  |
Shares authorized for grant |  |  |  | 0 |  |  | 4,900,000
Two Thousand fourteen Long Term Incentive Plan | Maximum [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Option term |  |  |  | 10 years |  |  |
Two Thousand fourteen Long Term Incentive Plan | Non Employee Director [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards vesting period |  |  |  | 1 year |  |  |
Two Thousand fourteen Long Term Incentive Plan | Employee [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards vesting period |  |  |  | 3 years |  |  |
Two Thousand Twenty One Long Term Incentive Plan |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Shares available for grant |  |  |  | 8,288,582 |  |  |
Shares authorized for grant |  |  |  | 13,467,480 |  |  | 13,500,000
Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan, as amended |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Shares available for grant |  |  |  | 0 |  |  |
Shares authorized for grant |  |  |  | 0 |  |  |
Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan, as amended | Non Employee Director [Member] | Employee Stock Option [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards vesting period |  |  |  | 1 year |  |  |
Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan, as amended | Employee [Member] | Employee Stock Option [Member] |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards vesting period |  |  |  | 3 years |  |  |

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