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Accumulated Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 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 income, net of tax |  |  | 23,913 |  |  |  | 406 |  |  |  | (2,883 | ) |  |  | 21,436 |
Balance at March 31, 2018 |  | $ | (45,505 | ) |  | $ | (36,697 | ) |  | $ | (6,429 | ) |  | $ | (88,631 | )

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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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