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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Loss | Treasury Stock | Accumulated Deficit | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2015 | $ 787,259 | $ 750 | $ 2,944,897 | $ (1,570) | $ (72,429) | $ (2,137,738) | $ 53,349
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Treasury stock purchased | (749) |  |  |  | (749) |  |
Cash dividends | (19,763) |  |  |  |  | (19,763) |
Stock-based compensation, net of forfeitures | 5,776 | 12 | 5,078 |  |  |  | 686
Stock options exercised | (1,057) |  | (1,057) |  |  |  |
Contribution from Exterran Corporation | 29,662 |  | 29,662 |  |  |  |
Partnership units issued in March 2016 Acquisition | 1,469 |  | 585 |  |  |  | 884
Cash distribution to noncontrolling unitholders of the Partnership | (31,183) |  |  |  |  |  | (31,183)
Comprehensive income (loss) | (15,322) |  |  | (2,011) |  | (6,296) | (7,015)
Ending balance at Jun. 30, 2016 | 756,092 | 762 | 2,979,165 | (3,581) | (73,178) | (2,163,797) | 16,721
Beginning balance at Dec. 31, 2016 | 684,928 | 762 | 3,021,040 | (1,678) | (73,944) | (2,227,214) | (34,038)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Treasury stock purchased | (2,180) |  |  |  | (2,180) |  |
Cash dividends | (16,992) |  |  |  |  | (16,992) |
Stock-based compensation, net of forfeitures | 4,258 | 5 | 3,984 |  |  |  | 269
Contribution from Exterran Corporation | 44,709 |  | 44,709 |  |  |  |
Cash distribution to noncontrolling unitholders of the Partnership | (20,908) |  |  |  |  |  | (20,908)
Stock options exercised | 939 | 1 | 938 |  |  |  |
Impact of adoption of Accounting Standards Update (ASU) 2016-09 | 1,290 |  | 209 |  |  | 1,081 |
Comprehensive income (loss) | (16,190) |  |  | 742 |  | (18,372) | 1,440
Ending balance at Jun. 30, 2017 | $ 679,854 | $ 768 | $ 3,070,880 | $ (936) | $ (76,124) | $ (2,261,497) | $ (53,237)

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