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Consolidated Statements of Comprehensive Income/(Loss) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement of Comprehensive Income [Abstract] |  |  |
Net income | $ 32,585 | $ 52,812 | $ 57,265
Other comprehensive income/(loss), before tax: |  |  |
Foreign currency translation adjustments | 44,162 | (23,967) | (51,177)
Pension/postretirement settlements and curtailments |  | 51 | 103
Pension/postretirement plan remeasurement | 2,955 | (5,498) | (700)
Amortization of pension liability adjustments: |  |  |
Prior service credit | (4,453) | (4,450) | (4,440)
Net actuarial loss | 5,439 | 5,102 | 5,932
Payments related to interest rate swaps included in earnings | 1,490 | 2,400 | 1,988
Derivative valuation adjustment | 325 | 1,297 | (2,961)
Income taxes related to items of other comprehensive income/(loss): |  |  |
Pension/postretirement settlements and curtailments |  | (6) |
Pension/postretirement plan remeasurement | (918) | 1,104 | 78
Amortization of pension liability adjustments | (22) | 27 | (270)
Payments related to interest rate swaps included in earnings | (566) | (912) | (755)
Derivative valuation adjustment | (124) | (493) | 1,125
Comprehensive income | 80,873 | 27,467 | 6,188
Comprehensive (loss)/income attributable to the noncontrolling interest | (520) | 77 | (9)
Comprehensive income attributable to the Company | $ 81,393 | $ 27,390 | $ 6,197

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