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Consolidated Statements Of Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Accumulated Deficit [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Total [Member]
--- | --- | --- | --- | --- | --- | ---
Stock Issued During Period, Value, Employee Stock Purchase Plan |  | $ 1 | $ 12,914 |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities | $ 0 |  |  |  |  |
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt |  |  | 0 |  |  |
Balance at Dec. 31, 2016 |  | 324 | 16,987,488 | $ (18,184,954) | $ (3,453) | $ (1,200,595)
Net income | 457,248 |  |  | 457,248 |  |
Other Comprehensive Income (Loss), Net of Tax | 512 |  |  |  | 512 |
Stock-based compensation |  |  | 55,362 |  |  |
Repurchase of common stock |  |  | (621,173) |  |  |
Balance at Dec. 31, 2017 |  | 325 | 16,437,135 | (17,694,790) | (2,941) | (1,260,271)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  |  | 2,544 | 32,916 |  |
Stock Issued During Period, Value, Employee Stock Purchase Plan |  | 1 | 12,835 |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities | 26 |  |  |  |  |
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt |  |  | (159,618) |  |  |
Net income | 582,489 |  |  | 582,489 |  |
Other Comprehensive Income (Loss), Net of Tax | 130 |  |  |  | 130 |
Stock-based compensation |  |  | 54,574 |  |  |
Repurchase of common stock |  |  | (638,152) |  |  |
Balance at Dec. 31, 2018 | $ (1,385,474) | 352 | 15,706,774 | (17,089,789) | (2,811) | (1,385,474)
Balance, shares at Dec. 31, 2018 | 120,037 |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  |  | 0 | 22,512 |  |
Stock Issued During Period, Value, Employee Stock Purchase Plan |  | 1 | 13,151 |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities | 26,100 |  |  |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities | $ 0 |  |  |  |  |
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt |  |  | 0 |  |  |
Net income | 612,299 |  |  | 612,299 |  |
Other Comprehensive Income (Loss), Net of Tax | 190 |  |  |  | 190 |
Stock-based compensation |  |  | 52,316 |  |  |
Repurchase of common stock |  |  | (782,583) |  |  |
Balance at Dec. 31, 2019 | $ (1,490,100) | $ 353 | 14,989,658 | (16,477,490) | $ (2,621) | $ (1,490,100)
Balance, shares at Dec. 31, 2019 | 116,716 |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |  |  | $ 0 | $ 0 |  |

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