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Employee Benefit Plans (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2014
Legacy Dawson Geophysical Company 401k Plan |  |  |  |
Percentage of employees gross pay that is matched | 6.00% | 6.00% | 6.00% | 6.00%
Employer matching contribution, percent matched | 100.00% | 100.00% | 100.00% | 100.00%
Matching contribution to the plan | $ 462,000 | $ 1,658,000 | $ 1,849,000 | $ 1,895,000
Legacy TGC 401k Plan |  |  |  |
Percentage of employees gross pay that is matched |  |  | 6.00% |
Employer matching contribution, percent matched |  |  | 50.00% |
Matching contribution to the plan |  |  | $ 98,000 |

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