Accumulated Other Comprehensive Earnings (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended |
Mar. 31, 2016 | Mar. 31, 2015 |
Accumulated other comprehensive earnings (loss), net of tax | | |
Balance at the beginning of the period | $ 698,183 | |
Balance at the end of the period | 697,164 | $ 687,831 |
AOCI from Derivatives | Foreign currency forward contracts | | |
Accumulated other comprehensive earnings (loss), net of tax | | |
Balance at the beginning of the period | (1,675) | (1,236) |
Other comprehensive earnings (loss) before reclassifications | 427 | (1,214) |
Reclassifications from accumulated other comprehensive loss | 387 | 327 |
Other comprehensive earnings (loss) net of tax | 814 | (887) |
Balance at the end of the period | (861) | (2,123) |
AOCI from Derivatives | Commodity futures contracts | | |
Accumulated other comprehensive earnings (loss), net of tax | | |
Balance at the beginning of the period | 173 | (470) |
Other comprehensive earnings (loss) before reclassifications | 187 | (722) |
Reclassifications from accumulated other comprehensive loss | 4 | 103 |
Other comprehensive earnings (loss) net of tax | 191 | (619) |
Balance at the end of the period | 364 | (1,089) |
Investments | | |
Accumulated other comprehensive earnings (loss), net of tax | | |
Balance at the beginning of the period | (605) | (332) |
Other comprehensive earnings (loss) before reclassifications | 312 | 237 |
Reclassifications from accumulated other comprehensive loss | 3 | |
Other comprehensive earnings (loss) net of tax | 315 | 237 |
Balance at the end of the period | (290) | (95) |
Postretirement and Pension Benefits | | |
Accumulated other comprehensive earnings (loss), net of tax | | |
Balance at the beginning of the period | 6,387 | 6,439 |
Reclassifications from accumulated other comprehensive loss | (262) | (232) |
Other comprehensive earnings (loss) net of tax | (262) | (232) |
Balance at the end of the period | 6,125 | 6,207 |
Foreign Currency Translation | | |
Accumulated other comprehensive earnings (loss), net of tax | | |
Balance at the beginning of the period | (21,644) | (17,499) |
Other comprehensive earnings (loss) before reclassifications | 205 | (1,159) |
Other comprehensive earnings (loss) net of tax | 205 | (1,159) |
Balance at the end of the period | (21,439) | (18,658) |
Accumulated Other Comprehensive Earnings ( Loss ) | | |
Accumulated other comprehensive earnings (loss), net of tax | | |
Balance at the beginning of the period | (17,364) | (13,098) |
Other comprehensive earnings (loss) before reclassifications | 1,131 | (2,858) |
Reclassifications from accumulated other comprehensive loss | 132 | 198 |
Other comprehensive earnings (loss) net of tax | 1,263 | (2,660) |
Balance at the end of the period | $ (16,101) | $ (15,758) |