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Stock-based Compensation - Additional Information (Detail) (USD $) | 12 Months Ended |  | 12 Months Ended |  | 1 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Employee Stock Option | Dec. 31, 2013 Restricted Stock Awards | Dec. 31, 2013 2009 Performance Units | Dec. 31, 2012 2009 Performance Units | Dec. 31, 2011 2009 Performance Units | Apr. 30, 2012 2009 Performance Units | Apr. 30, 2013 Performance Unit Awards 2010 | Dec. 31, 2013 Performance Unit Awards 2010 | Dec. 31, 2012 Performance Unit Awards 2010 | Dec. 31, 2011 Performance Unit Awards 2010 | Dec. 31, 2013 Acquired to satisfy the exercise price Employee Stock Option | Dec. 31, 2013 Acquired to satisfy payroll tax withholding obligations Employee Stock Option | Dec. 31, 2013 Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan, as amended Maximum | Dec. 31, 2013 Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan, as amended Non Employee Director | Dec. 31, 2013 Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan, as amended Employees | Dec. 31, 2013 Patterson-UTI Energy, Inc. Amended and Restated 1997 Long-Term Incentive Plan, as amended ("1997 Plan") Restricted Stock Awards | Dec. 31, 2013 Patterson-UTI Energy, Inc. Amended and Restated 1997 Long-Term Incentive Plan, as amended ("1997 Plan") Maximum Employee Stock Option | Dec. 31, 2013 Patterson-UTI Energy, Inc. Amended and Restated 1997 Long-Term Incentive Plan, as amended ("1997 Plan") Minimum Employee Stock Option
Compensation Related Costs Share Based Payments Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Awards vesting period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year | 3 years | 4 years | 5 years | 3 years
Option term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  | 10 years |
Treasury stock shares acquired |  |  |  | 637,624 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury stock acquisition price | $ 85,837,000 | $ 170,292,000 | $ 4,314,000 |  |  |  |  |  |  |  |  |  |  | $ 12,300,000 | $ 2,900,000 |  |  |  |  |  |
Options outstanding, aggregate intrinsic value | 37,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding, weighted-average remaining contractual term | 5 years 1 month 6 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercisable, aggregate intrinsic value | 32,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercisable, weighted-average remaining contractual term | 4 years 5 months 12 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding non-vested options | 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding non-vested restricted stock |  |  |  |  | 1,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Performance period |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Award description |  |  |  |  |  | Generally, the recipients would receive a target payment if the Company's total shareholder return was positive and, when compared to the peer group, was at or above the 50thpercentile but less than the 75thpercentile and two times the target if at the 75thpercentile or higher. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Target awards payment |  |  |  |  |  | 3,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pro-rated obligation |  |  |  |  |  |  |  |  | 1,700,000 |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense |  |  |  |  |  |  | $ (1,900,000) | $ 1,300,000 |  |  | $ 260,000 | $ 1,039,000 | $ 1,039,000 |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  | 357,500 |  |  |  |  |  |  |  |  |  |  |

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