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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Consolidated Statements of Comprehensive Income [Abstract] |  |  |
Net income | $ 30,977 | $ 34,938 | $ 37,636
Other comprehensive income/(loss), before tax: |  |  |
Foreign currency translation adjustments | 11,865 | (13,070) | (10,208)
Pension settlement | 118,350 | 327 | (1,048)
Pension and postretirement plan remeasurement | (48,233) | (28,375) | (19,645)
Amortization of pension liability adjustments: |  |  |
Transition obligation | 79 | 83 | 94
Prior service cost/(credit) | (3,631) | (3,629) | (3,650)
Net actuarial loss | 7,438 | 8,694 | 7,661
Derivative valuation adjustment | (467) | (3,799) | (452)
Income taxes related to items of other comprehensive (loss)/income: |  |  |
Pension settlement | (39,146) | (72) | 160
Pension and postretirement plan remeasurement | 14,711 | 6,382 | 3,002
Amortization of pension liability adjustment | (1,360) | (1,159) | (626)
Derivative valuation adjustment | 182 | 1,481 | 176
Other comprehensive income/(loss), after tax | 59,788 | (33,137) | (24,536)
Comprehensive income | $ 90,765 | $ 1,801 | $ 13,100

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