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Unaudited Consolidated Statement of Equity - 6 months ended Jun. 30, 2015 - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Retained Earnings [Member] | Noncontrolling Interests [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2014 | $ 306,354 | $ 5 | $ (495) | $ 254,233 | $ (502) | $ 52,762 | $ 351
Beginning balance, shares at Dec. 31, 2014 |  | 54,634 | 449 |  |  |  |
Increase (Decrease) in Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | (14,062) |  |  |  |  | (14,062) |
Foreign currency translation adjustment | (164) |  |  |  | (164) |  |
Stock issued under employee stock purchase plan | 543 |  |  | 543 |  |  |
Stock issued in payment of stock purchase plan, shares |  |  | (41) |  |  |  |
Stock options exercised | 1,149 | $ 1 |  | 1,148 |  |  |
Stock options exercised, shares |  | 736 |  |  |  |  |
Stock surrendered for exercise of stock options | (1,126) |  | $ (1,126) |  |  |  |
Stock surrendered for exercise of stock options, shares |  |  | 88 |  |  |  |
Restricted stock granted, shares |  | 488 |  |  |  |  |
Restricted stock forfeited, shares |  |  | 20 |  |  |  |
Treasury stock purchased | (5,339) |  | $ (5,339) |  |  |  |
Treasury stock purchased, shares |  |  | 395 |  |  |  |
Stock compensation expense | 6,910 |  |  | 6,910 |  |  |
Excess tax benefit related to share-based awards | 2,149 |  |  | 2,149 |  |  |
Investment in Flotek Gulf, LLC and Flotek Gulf Research, LLC | 7 |  |  |  |  |  | 7
Stock issued in IAL acquisition | 1,014 |  |  | 1,014 |  |  |
Stock issued in IAL acquisition, shares |  | 60 |  |  |  |  |
Repurchase of common stock | (7,260) |  | $ (7,260) |  |  |  |
Repurchase of common stock, shares |  |  | 547 |  |  |  |
Ending balance at Jun. 30, 2015 | $ 290,175 | $ 6 | $ (14,220) | $ 265,997 | $ (666) | $ 38,700 | $ 358
Ending balance, shares at Jun. 30, 2015 |  | 55,918 | 1,458 |  |  |  |

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