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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
--- | --- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Impact of adoption of Accounting Standard Update | ASU 2016-09 | $ 1,290 |  | $ 209 |  |  | $ 1,081 |
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
Stock options exercised | 939 | 1 | 938 |  |  |  |
Contribution from Exterran Corporation | 44,709 |  | 44,709 |  |  |  |
Cash distribution to noncontrolling unitholders of the Partnership | (20,908) |  |  |  |  |  | (20,908)
Comprehensive loss |  |  |  |  |  |  |
Net income (loss) | (18,049) |  |  |  |  | (18,372) | 323
Derivative gain, net of reclassifications to earnings | 1,814 |  |  | 697 |  |  | 1,117
Amortization of terminated interest rate swaps | 45 |  |  | 45 |  |  |
Merger-related adjustments | 0 |  |  |  |  |  |
Ending balance at Jun. 30, 2017 | 679,854 | 768 | 3,070,880 | (936) | (76,124) | (2,261,497) | (53,237)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Impact of adoption of Accounting Standard Update | ASU 2014-09 | 14,666 |  |  |  |  | 14,666 |
Impact of adoption of Accounting Standard Update | ASU 2017-12 | 383 |  |  |  |  | 383 |
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 | (24,018) |  |  |  |  | (24,018) |
Shares issued in employee stock purchase plan | 416 | 1 | 415 |  |  |  |
Stock-based compensation, net of forfeitures | 3,513 | 9 | 3,568 |  |  |  | (64)
Stock options exercised | 262 |  | 262 |  |  |  |
Cash distribution to noncontrolling unitholders of the Partnership | (11,766) |  |  |  |  |  | (11,766)
Merger-related adjustments | 94,292 | 576 | 52,815 |  |  |  | 40,901
Comprehensive loss |  |  |  |  |  |  |
Net income (loss) | 6,218 |  |  |  |  | (1,879) | 8,097
Derivative gain, net of reclassifications to earnings | 6,282 |  |  | 2,019 |  |  | 4,263
Amortization of terminated interest rate swaps | 230 |  |  | 230 |  |  |
Merger-related adjustments | 5,670 |  |  | 5,670 |  |  |
Ending balance at Jun. 30, 2018 | $ 830,725 | $ 1,355 | $ 3,150,118 | 9,374 | $ (77,773) | (2,252,349) | $ 0
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Impact of adoption of ASU 2018-02 |  |  |  | $ 258 |  | $ (258) |

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