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Stockholders' Deficit Stockholders' Deficit (Equity) (Tables) | 12 Months Ended
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Dec. 31, 2017
Stockholders' Equity Note [Abstract] |
Schedule of Common Stock Repurchase | The summary of the Company’s common stock repurchases for 2017, 2016 and 2015 are as follows:
| 2017 |  | 2016 |  | 2015
Shares |  | Average Price |  | Shares |  | Average Price |  | Shares |  | Average Price
| (In thousands, except average price amounts)
Total repurchases under the repurchase plans | 6,265 |  |  | $ | 94.59 |  |  | 7,789 |  |  | $ | 81.73 |  |  | 9,338 |  |  | $ | 66.59 |
Total repurchases for tax withholdings | 335 |  |  | $ | 85.27 |  |  | 320 |  |  | $ | 80.74 |  |  | 333 |  |  | $ | 64.03 |
Total repurchases | 6,600 |  |  | $ | 94.12 |  |  | 8,109 |  |  | $ | 81.70 |  |  | 9,671 |  |  | $ | 66.50 |
Total costs | $ | 621,173 |  |  |  |  | $ | 662,491 |  |  |  |  | $ | 643,169 |  |  |
Schedule of Accumulated Other Comprehensive Loss | The following table summarizes the changes in the components of Accumulated other comprehensive loss for 2017 and 2016:
| Foreign Currency Translation Adjustments Loss |  | Unrealized (Loss) Gain On Investments |  | Total Accumulated Other Comprehensive Loss
| (In thousands)
Balance, December 31, 2015 | $ | (3,451 | ) |  | $ | (542 | ) |  | $ | (3,993 | )
Changes | 85 |  |  | 455 |  |  | 540 |
Balance, December 31, 2016 | (3,366 | ) |  | (87 | ) |  | (3,453 | )
Changes | 530 |  |  | (18 | ) |  | 512 |
Balance, December 31, 2017 | $ | (2,836 | ) |  | $ | (105 | ) |  | $ | (2,941 | )

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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=66004124&loc=SL7669686-108580 + Details
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- Definition Schedule of common stock repurchase [Table Text Block] + References No definition available. + Details
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