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Condensed Consolidated Statement of Changes in Shareholders' Equity - Unaudited - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands | Total | Common Stock | Additional paid-in capital | Accumulated deficit | Treasury Stock | Total shareholders’ equity attributable to Matador Resources Company | Non-controlling interest in subsidiaries
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance, shares at Dec. 31, 2016 | 99,511,931 | 99,519,000 |  |  | 6,000 |  |
Balance at January 1, 2017 at Dec. 31, 2016 | $ 691,445 | $ 995 | $ 1,325,481 | $ (636,351) | $ 0 | $ 690,125 | $ 1,320
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Issuance of common stock, shares |  | 406,000 |  |  |  |  |
Issuance of common stock pursuant to employee stock compensation plan | 0 | $ 4 | (4) |  |  | 0 |
Common stock issued to Board members and advisors, shares |  | 19,000 |  |  |  |  |
Stock Issued During Period, Value, Issued for Services | 0 |  | 0 |  |  | 0 |
Stock-based compensation expense related to equity-based awards | 4,318 |  | 4,318 |  |  | 4,318 |
Stock options exercised, net of options forfeited in net share settlements |  | $ 3 |  |  |  |  |
Stock options exercised, shares |  | 260,000 |  |  |  |  |
Stock options exercised, net of options forfeited in net share settlements |  |  | 716 |  |  | 719 |
Stock options exercised, net of options forfeited in net share settlements | 719 |  |  |  |  |  |
Restricted stock forfeited, shares |  |  |  |  | 62,000 |  |
Restricted stock forfeited | (633) |  |  |  | $ (633) | (633) |
Purchase of non-controlling interest of less-than-wholly-owned subsidiary | (2,653) |  | (1,250) |  |  | (1,250) | (1,403)
Adjustments to Additional Paid in Capital, Formation of Joint Venture | 171,500 |  | 115,002 |  |  | 115,002 | 56,498
Contributions from non-controlling interest owners of less-than-wholly-owned subsidiaries | 4,900 |  |  |  |  |  | 4,900
Current period net income | $ 45,900 |  |  | 43,984 |  | 43,984 | 1,916
Ending Balance, shares at Mar. 31, 2017 | 100,135,608 | 100,204,000 |  |  | 68,000 |  |
Balance at March 31, 2017 at Mar. 31, 2017 | $ 915,496 | $ 1,002 | $ 1,444,263 | $ (592,367) | $ (633) | $ 852,265 | $ 63,231

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