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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional paid-in capital [Member] | Retained earnings [Member] | Treasury stock [Member] | Deferred Compensation, Share-based Payments [Member] | Accumulated other comprehensive income (loss) [Member] | Parent [Member] | Noncontrolling interest [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, Beginning (in shares) at Dec. 31, 2017 |  | 59,800,559 |  |  |  |  |  |  |
Balance, Beginning at Dec. 31, 2017 | $ 310,084 |  | $ 531,708 | $ (44,022) | $ (8,606) | $ 1,075 | $ (157,076) | $ 320,929 | $ (10,845)
Net income (loss) | 14,686 |  |  | 16,365 |  |  |  | 16,365 |
Currency translation adjustment, net | 8,062 |  |  |  |  |  | 7,423 | 7,423 | 291
Temporary Equity, Foreign Currency Translation Adjustments | 7,714 |  |  |  |  |  |  |  |
Pension liability adjustments, net of tax | 883 |  |  |  |  |  | 883 | 883 |
Dividends declared | (299) |  |  | (299) |  |  |  | (299) |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 123 |  |  | 88 |  |  |  | 88 | 35
Redemption value adjustment | 2,343 |  | (2,343) |  |  |  |  | (2,343) |
Stock-based compensation | 73 |  | 73 |  |  |  |  | 73 |
VIE contributions | 476 |  |  |  |  |  |  | 0 | 476
Issuance of treasury stock under 401(k) plan |  | 10,211 |  |  |  |  |  |  |
Issuance of treasury stock under 401(k) plan | (133) |  | (42) |  | (91) |  |  | (133) |
Net Income (Loss) Attributable to Nonredeemable Noncontrolling Interest | $ 15,201 |  |  |  |  |  |  |  | (1,164)
Balance, Ending (in shares) at Mar. 31, 2018 | 59,810,770 | 59,810,770 |  |  |  |  |  |  |
Balance, Ending at Mar. 31, 2018 | $ 332,045 |  | $ 529,480 | $ (27,868) | $ (8,515) | $ 1,075 | $ (148,770) | $ 343,252 | $ (11,207)
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest | (515) |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Portion Attributable to Noncontrolling Interest | $ 348 |  |  |  |  |  |  |  |

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