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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Accumulated Deficit | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
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 | (8,458) |  |  |  |  | (8,458) |
Stock-based compensation, net of forfeitures | 2,089 | 5 | 2,147 |  |  |  | (63)
Stock options exercised | 939 | 1 | 938 |  |  |  |
Contribution from Exterran Corporation | 19,709 |  | 19,709 |  |  |  |
Cash distribution to noncontrolling unitholders of the Partnership | (10,446) |  |  |  |  |  | (10,446)
Impact of adoption of Accounting Standard Update | 1,290 |  | 209 |  |  | 1,081 |
Comprehensive income (loss) | (12,573) |  |  | 549 |  | (11,685) | (1,437)
Ending balance at Mar. 31, 2017 | 675,298 | 768 | 3,044,043 | (1,129) | (76,124) | (2,246,276) | (45,984)
Beginning balance at Dec. 31, 2017 | 735,618 | 769 | 3,093,058 | 1,197 | (76,732) | (2,241,243) | (41,431)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Treasury stock purchased | (1,041) |  |  |  | (1,041) |  |
Cash dividends | (8,532) |  |  |  |  | (8,532) |
Shares issued in employee stock purchase plan | 223 |  | 223 |  |  |  |
Stock-based compensation, net of forfeitures | 1,545 | 9 | 1,600 |  |  |  | (64)
Cash distribution to noncontrolling unitholders of the Partnership | (11,766) |  |  |  |  |  | (11,766)
Impact of adoption of Accounting Standard Update | 14,666 |  |  | (125) |  | 14,791 |
Comprehensive income (loss) | 7,160 |  |  | 2,122 |  | (3,816) | 8,854
Ending balance at Mar. 31, 2018 | $ 737,873 | $ 778 | $ 3,094,881 | $ 3,194 | $ (77,773) | $ (2,238,800) | $ (44,407)

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