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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Abstract] |
Summary of components of other comprehensive income | The cumulative balance of each component of other comprehensive income (loss) and the income tax effects allocated to each component are as follows:
|  | Pension and other post-retirement actuarial items |  |  | Currency translation adjustment |  |  | Unrealized gain (loss) on available-for-sale securities |  |  | Total |
Balance at January 1, 2015 |  | $ | (155,760 | ) |  | $ | 84,703 |  |  | $ | 1,917 |  |  | $ | (69,140 | )
Other comprehensive income before reclassifications |  |  | 15,169 |  |  |  | (80,106 | ) |  |  | (1,503 | ) |  | $ | (66,440 | )
Tax effect |  |  | (4,196 | ) |  |  | - |  |  |  | 526 |  |  | $ | (3,670 | )
Other comprehensive income before reclassifications, net of tax |  |  | 10,973 |  |  |  | (80,106 | ) |  |  | (977 | ) |  | $ | (70,110 | )
Amounts reclassified out of AOCI |  |  | 12,869 |  |  |  | - |  |  |  | (680 | ) |  | $ | 12,189 |
Tax effect |  |  | (4,504 | ) |  |  | - |  |  |  | 238 |  |  | $ | (4,266 | )
Amounts reclassified out of AOCI, net of tax |  |  | 8,365 |  |  |  | - |  |  |  | (442 | ) |  | $ | 7,923 |
Net comprehensive income (loss) |  | $ | 19,338 |  |  | $ | (80,106 | ) |  | $ | (1,419 | ) |  | $ | (62,187 | )
Balance at December 31, 2015 |  | $ | (136,422 | ) |  | $ | 4,597 |  |  | $ | 498 |  |  | $ | (131,327 | )
Other comprehensive income before reclassifications |  |  | (32,398 | ) |  |  | (35,863 | ) |  |  | 941 |  |  | $ | (67,320 | )
Tax effect |  |  | 9,815 |  |  |  | - |  |  |  | (329 | ) |  | $ | 9,486 |
Other comprehensive income before reclassifications, net of tax |  |  | (22,583 | ) |  |  | (35,863 | ) |  |  | 612 |  |  | $ | (57,834 | )
Amounts reclassified out of AOCI |  |  | 91,014 |  |  |  | - |  |  |  | - |  |  | $ | 91,014 |
Tax effect |  |  | 3,495 |  |  |  | - |  |  |  | - |  |  | $ | 3,495 |
Amounts reclassified out of AOCI, net of tax |  |  | 94,509 |  |  |  | - |  |  |  | - |  |  | $ | 94,509 |
Net comprehensive income (loss) |  | $ | 71,926 |  |  | $ | (35,863 | ) |  | $ | 612 |  |  | $ | 36,675 |
Balance at December 31, 2016 |  | $ | (64,496 | ) |  | $ | (31,266 | ) |  | $ | 1,110 |  |  | $ | (94,652 | )
Other comprehensive income before reclassifications |  |  | (15,671 | ) |  |  | 124,220 |  |  |  | 1,881 |  |  | $ | 110,430 |
Tax effect |  |  | 4,373 |  |  |  | - |  |  |  | (659 | ) |  | $ | 3,714 |
Other comprehensive income before reclassifications, net of tax |  |  | (11,298 | ) |  |  | 124,220 |  |  |  | 1,222 |  |  | $ | 114,144 |
Amounts reclassified out of AOCI |  |  | 9,147 |  |  |  | - |  |  |  | (817 | ) |  | $ | 8,330 |
Tax effect |  |  | (2,394 | ) |  |  | - |  |  |  | 286 |  |  | $ | (2,108 | )
Amounts reclassified out of AOCI, net of tax |  |  | 6,753 |  |  |  | - |  |  |  | (531 | ) |  | $ | 6,222 |
Net comprehensive income (loss) |  | $ | (4,545 | ) |  | $ | 124,220 |  |  | $ | 691 |  |  | $ | 120,366 |
Balance at December 31, 2017 |  | $ | (69,041 | ) |  | $ | 92,954 |  |  | $ | 1,801 |  |  | $ | 25,714 |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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