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CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock Issued | Common Stock in Treasury | Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2015 |  | 23,176 | 8,825 |  |  |  |
Balance at Dec. 31, 2015 | $ 257,908 | $ 232 | $ (210,333) | $ 228,269 | $ (15,799) | $ 255,240 | $ 299
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | 20,384 |  |  |  |  | 20,354 | 30
Currency translation adjustment | (7,022) |  |  |  | (7,022) |  |
Shares issued for employee benefit plan and compensation (in shares) |  | 130 |  |  |  |  |
Shares issued for employee benefit plan and compensation | $ 913 | $ 1 |  | 912 |  |  |
Purchase of treasury shares (in shares) | (198) |  | (198) |  |  |  |
Purchase of treasury shares | $ (12,647) |  | $ (12,647) |  |  |  |
Stock options exercised (in shares) | 239 | 239 |  |  |  |  |
Stock options exercised | $ 6,244 | $ 3 |  | 6,241 |  |  |
Shares Issued to directors (in shares) |  | 30 |  |  |  |  |
Shares issued to directors | 0 | $ 0 |  | 0 |  |  |
Employee and director stock-based compensation | 10,324 |  |  | 10,324 |  |  |
Tax benefit from exercise of non-qualified stock options and vested restricted stock | 2,007 |  |  | 2,007 |  |  |
Performance - based common stock warrants | 2,728 |  |  | 2,728 |  |  |
Deconsolidation of Encore Controls LLC | (329) |  |  |  |  |  | (329)
Balance (in shares) at Dec. 31, 2016 |  | 23,575 | 9,023 |  |  |  |
Balance at Dec. 31, 2016 | 280,510 | $ 236 | $ (222,980) | 250,481 | (22,821) | 275,594 | 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Impact to retained earnings from adoption of new accounting pronouncement | 1,509 |  |  |  |  | 1,509 |
Balance at January 1 | 282,019 | $ 236 | $ (222,980) | 250,481 | (22,821) | 277,103 | 0
Net income (loss) | (10,323) |  |  |  |  | (10,323) |
Currency translation adjustment | 6,222 |  |  |  | 6,222 |  |
Shares issued for employee benefit plan and compensation (in shares) |  | 99 |  |  |  |  |
Shares issued for employee benefit plan and compensation | $ 648 | $ 1 |  | 647 |  |  |
Purchase of treasury shares (in shares) | (680) |  | (680) |  |  |  |
Purchase of treasury shares | $ (39,085) |  | $ (39,085) |  |  |  |
Stock options exercised (in shares) | 56 | 56 |  |  |  |  |
Stock options exercised | $ 1,442 | $ 1 |  | 1,441 |  |  |
Shares Issued to directors (in shares) |  | 30 |  |  |  |  |
Shares issued to directors | 0 | $ 0 |  | 0 |  |  |
Employee and director stock-based compensation | 11,943 |  |  | 11,943 |  |  |
Performance-based common stock warrants | 683 |  |  | 683 |  |  |
Balance (in shares) at Dec. 31, 2017 |  | 23,760 | 9,703 |  |  |  |
Balance at Dec. 31, 2017 | 253,549 | $ 238 | $ (262,065) | 265,195 | (16,599) | 266,780 | 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Impact to retained earnings from adoption of new accounting pronouncement | 4,084 |  |  |  |  | 4,084 |
Balance at January 1 | 257,633 | $ 238 | $ (262,065) | 265,195 | (16,599) | 270,864 | 0
Net income (loss) | 11,924 |  |  |  |  | 11,924 |
Currency translation adjustment | (3,682) |  |  |  | (3,682) |  |
Shares issued for employee benefit plan and compensation (in shares) |  | 108 |  |  |  |  |
Shares issued for employee benefit plan and compensation | $ 1,062 | $ 1 |  | 1,061 |  |  |
Purchase of treasury shares (in shares) | (413) |  | (413) |  |  |  |
Purchase of treasury shares | $ (13,824) |  | $ (13,824) |  |  |  |
Stock options exercised (in shares) | 35 | 35 |  |  |  |  |
Stock options exercised | $ 864 | $ 0 |  | 864 |  |  |
Shares Issued to directors (in shares) |  | 30 |  |  |  |  |
Shares issued to directors | 0 | $ 0 |  | 0 |  |  |
Employee and director stock-based compensation | 8,820 |  |  | 8,820 |  |  |
Performance-based common stock warrants | 163 |  |  | 163 |  |  |
Balance (in shares) at Dec. 31, 2018 |  | 23,933 | 10,116 |  |  |  |
Balance at Dec. 31, 2018 | $ 262,960 | $ 239 | $ (275,889) | $ 276,103 | $ (20,281) | $ 282,788 | $ 0

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