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Accumulated Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income | The components of accumulated other comprehensive income (loss) are detailed as follows (in thousands):
|  | Currency Translation |  |  | Unrealized Gain (Loss) on Retirement Plans |  |  | Unrealized Gain (Loss) on Investments |  |  | Accumulated Other Comprehensive Income (Loss) |
Balance at December 31, 2017 |  | $ | (69,418 | ) |  | $ | (37,103 | ) |  | $ | (3,546 | ) |  | $ | (110,067 | )
Other comprehensive (loss) income, net of tax |  |  | (23,246 | ) |  |  | 1,678 |  |  |  | (1,266 | ) |  |  | (22,834 | )
Balance at June 30, 2018 |  | $ | (92,664 | ) |  | $ | (35,425 | ) |  | $ | (4,812 | ) |  | $ | (132,901 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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