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ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Accumulated other comprehensive earnings (loss), net of tax |  |
Balance at the beginning of the period | $ 733,840 |
Adoption of ASU 2018-02 | 2,726 |
Balance at the end of the period | 750,622 | $ 733,840
Foreign Currency Derivatives |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Balance at the beginning of the period | 51 | (76)
Other comprehensive earnings (loss) before reclassifications | (318) | 152
Reclassifications from accumulated other comprehensive loss | (51) | (25)
Other comprehensive earnings (loss) net of tax | (369) | 127
Balance at the end of the period | (309) | 51
Foreign Currency Derivatives | ASU 2018-02 |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Adoption of ASU 2018-02 | 9 |
Investments |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Balance at the beginning of the period | (889) | (697)
Other comprehensive earnings (loss) before reclassifications | (459) | (192)
Other comprehensive earnings (loss) net of tax | (459) | (192)
Balance at the end of the period | (1,516) | (889)
Investments | ASU 2018-02 |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Adoption of ASU 2018-02 | (168) |
Postretirement and Pension Benefits |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Balance at the beginning of the period | 3,289 | 4,873
Other comprehensive earnings (loss) before reclassifications | 1,172 | (651)
Reclassifications from accumulated other comprehensive loss | (1,003) | (933)
Other comprehensive earnings (loss) net of tax | 169 | (1,584)
Balance at the end of the period | 4,206 | 3,289
Postretirement and Pension Benefits | ASU 2018-02 |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Adoption of ASU 2018-02 | 748 |
Foreign Currency Translation |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Balance at the beginning of the period | (24,262) | (25,460)
Other comprehensive earnings (loss) before reclassifications | 103 | 1,198
Other comprehensive earnings (loss) net of tax | 103 | 1,198
Balance at the end of the period | (24,159) | (24,262)
Commodity Derivatives |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Balance at the beginning of the period | 20 | 1,114
Other comprehensive earnings (loss) before reclassifications | (1,754) | (1,050)
Reclassifications from accumulated other comprehensive loss | 1,286 | (44)
Other comprehensive earnings (loss) net of tax | (468) | (1,094)
Balance at the end of the period | (444) | 20
Commodity Derivatives | ASU 2018-02 |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Adoption of ASU 2018-02 | 4 |
Accumulated Other Comprehensive Earnings ( Loss ) |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Balance at the beginning of the period | (21,791) | (20,246)
Other comprehensive earnings (loss) before reclassifications | (1,256) | (543)
Reclassifications from accumulated other comprehensive loss | 232 | (1,002)
Other comprehensive earnings (loss) net of tax | (1,024) | (1,545)
Balance at the end of the period | (22,222) | $ (21,791)
Accumulated Other Comprehensive Earnings ( Loss ) | ASU 2018-02 |  |
Accumulated other comprehensive earnings (loss), net of tax |  |
Adoption of ASU 2018-02 | $ 593 |

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