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Stockholders' Deficit | 12 Months Ended
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Dec. 31, 2018
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 8, 2018, the Company’s Board of Directors (“Board”) authorized the repurchase of its common stock in the amount of approximately $585.8 million, in addition to the $414.2 million remaining available for repurchase under the previous share repurchase program, for a total repurchase authorization of up to $1.0 billion under the share repurchase program. 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, 2018 there was approximately $463.2 million remaining available for repurchases under the share repurchase program. Effective February 7, 2019, the Company’s Board authorized the repurchase of its common stock in the amount of approximately $602.9 million, in addition to the $397.1 million remaining available for repurchase under the previous share repurchase program, for a total repurchase authorization of up to $1.0 billion under the share repurchase program. The summary of the Company’s common stock repurchases for 2018, 2017 and 2016 are as follows:
| 2018 |  | 2017 |  | 2016
Shares |  | Average Price |  | Shares |  | Average Price |  | Shares |  | Average Price
| (In thousands, except average price amounts)
Total repurchases under the repurchase plans | 4,352 |  |  | $ | 137.86 |  |  | 6,265 |  |  | $ | 94.59 |  |  | 7,789 |  |  | $ | 81.73 |
Total repurchases for tax withholdings | 309 |  |  | $ | 123.62 |  |  | 335 |  |  | $ | 85.27 |  |  | 320 |  |  | $ | 80.74 |
Total repurchases | 4,661 |  |  | $ | 136.91 |  |  | 6,600 |  |  | $ | 94.12 |  |  | 8,109 |  |  | $ | 81.70 |
Total costs | $ | 638,152 |  |  |  |  | $ | 621,173 |  |  |  |  | $ | 662,491 |  |  |
Since inception, the Company has repurchased 232.3 million shares of its common stock for an aggregate cost of $9.42 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 2018 and 2017:
| Foreign Currency Translation Adjustments Loss |  | Unrealized Gain (Loss) On Investments |  | Total Accumulated Other Comprehensive Loss
| (In thousands)
Balance, December 31, 2016 | $ | (3,366 | ) |  | $ | (87 | ) |  | $ | (3,453 | )
Changes | 530 |  |  | (18 | ) |  | 512 |
Balance, December 31, 2017 | (2,836 | ) |  | (105 | ) |  | (2,941 | )
Changes | — |  |  | 130 |  |  | 130 |
Balance, December 31, 2018 | $ | (2,836 | ) |  | $ | 25 |  |  | $ | (2,811 | )

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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