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Stockholders' Deficit | 12 Months Ended
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Dec. 31, 2017
Stockholders' Equity Note [Abstract] |
Stockholders' Deficit | Stockholders’ Deficit Treasury Stock Treasury stock is accounted for under the cost method. Treasury stock includes shares repurchased under stock repurchase programs and shares withheld in lieu of minimum tax withholdings due upon vesting of RSUs. On February 9, 2017, the Company’s Board of Directors (“Board”) authorized the repurchase of approximately $640.9 million of its common stock, in addition to the $359.1 million of its common stock remaining available for repurchase under the previous share repurchase program, for a total repurchase authorization of up to $1.0 billion of its common stock. The share repurchase program has no expiration date. Purchases made under the program could be effected through open market transactions, block purchases, accelerated share repurchase agreements or other negotiated transactions. As of December 31, 2017 there was approximately $477.4 million remaining available for repurchases under the share repurchase program. Effective February 8, 2018, the Company’s Board authorized the repurchase of approximately $585.8 million of its common stock, in addition to the $414.2 million of its common stock remaining available for repurchase under the previous share repurchase program, for a total repurchase authorization of up to $1.0 billion of its common stock. 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 |  |  |
Since inception, the Company has repurchased 227.6 million shares of its common stock for an aggregate cost of $8.8 billion, which is recorded as a reduction of Additional paid-in capital. 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 The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Preferred Stock -URI http://asc.fasb.org/extlink&oid=6521494 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 + Details
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