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Consolidated Statements Of Stockholders' Equity (Deficit) And Comprehensive Income (Loss) - 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]
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 |  | $ 322 | $ 18,120,045 | $ (19,000,835) | $ (2,998) | $ (883,466)
Balance, shares at Dec. 31, 2014 |  | 118,452 |  |  |  |
Net income | $ 375,236 |  |  | 375,236 |  | 375,236
Other Comprehensive Income (Loss), Net of Tax | (995) |  |  |  | (995) | (995)
Issuance of common stock under stock plans |  | $ 1 | 14,689 |  |  | 14,690
Issuance of common stock under stock plans, shares |  | 1,291 |  |  |  |
Stock-based compensation |  |  | 48,793 |  |  | 48,793
Net excess income tax benefits associated with stock-based compensation and other |  |  | 18,464 |  |  | 18,464
Repurchase of common stock |  |  | (643,169) |  |  | (643,169)
Repurchase of common stock, shares |  | (9,671) |  |  |  |
Balance at Dec. 31, 2015 |  | $ 323 | 17,558,822 | (18,625,599) | (3,993) | (1,070,447)
Balance, shares at Dec. 31, 2015 |  | 110,072 |  |  |  |
Net income | 440,645 |  |  | 440,645 |  | 440,645
Other Comprehensive Income (Loss), Net of Tax | 540 |  |  |  | 540 | 540
Issuance of common stock under stock plans |  | $ 1 | 13,669 |  |  | 13,670
Issuance of common stock under stock plans, shares |  | 1,128 |  |  |  |
Stock-based compensation |  |  | 52,430 |  |  | 52,430
Net excess income tax benefits associated with stock-based compensation and other |  |  | 25,058 |  |  | 25,058
Repurchase of common stock |  |  | (662,491) |  |  | (662,491)
Repurchase of common stock, shares |  | (8,109) |  |  |  |
Balance at Dec. 31, 2016 | $ (1,200,595) | $ 324 | 16,987,488 | (18,184,954) | (3,453) | (1,200,595)
Balance, shares at Dec. 31, 2016 | 103,091 | 103,091 |  |  |  |
Net income | $ 457,248 |  |  | 457,248 |  | 457,248
Other Comprehensive Income (Loss), Net of Tax | 512 |  |  |  | 512 | 512
Issuance of common stock under stock plans |  | $ 1 | 12,914 |  |  | 12,915
Issuance of common stock under stock plans, shares |  | 1,100 |  |  |  |
Stock-based compensation |  |  | 55,362 |  |  | 55,362
Repurchase of common stock |  |  | (621,173) |  |  | (621,173)
Repurchase of common stock, shares |  | (6,600) |  |  |  |
Balance at Dec. 31, 2017 | $ (1,260,271) | $ 325 | $ 16,437,135 | $ (17,694,790) | $ (2,941) | $ (1,260,271)
Balance, shares at Dec. 31, 2017 | 97,591 | 97,591 |  |  |  |

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- Definition Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65880886&loc=d3e23524-113945 Reference 2: 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 3: 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 + Details
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- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669619-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669625-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581 + Details
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- Definition Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References Reference 1: 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 2: 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(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: 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 4: 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 + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: 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(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: 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 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 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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