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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive (Loss) Income | Retained Earnings (Accumulated Deficit)
--- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2009 | $ 664,579 | $ 21,864 | $ 1,202,426 | $ (2,330) | $ (557,381)
Beginning Balance, Shares at Dec. 31, 2009 |  | 174,908 |  |  |
Issuance of stock to employees under benefit plans, net of shares withheld for payroll tax (in shares) |  | 7,127 |  |  |
Issuance of stock to employees under benefit plans, net of shares withheld for payroll tax | 37,410 | 891 | 36,519 |  |
Stock-based compensation expense | 30,580 |  | 30,580 |  |
Net income | 384,820 |  |  |  | 384,820
Unrealized gain on marketable securities |  |  |  |  |
Unrealized gain on marketable securities, net of tax of $(169) in 2012, $666 in 2011 and $0 in 2010 | 1,466 |  |  | 1,466 |
Less: reclassification adjustment for gains (losses) included in net income | 93 |  |  | 93 |
Foreign currency translation adjustment | (349) |  |  | (349) |
Prior service cost arising during period | 3,279 |  |  | 3,279 |
Amortization of prior service costs, net of tax of $(134) in 2012, $9 in 2011 and $ 0 in 2010 | 310 |  |  | 310 |
Ending Balance at Dec. 31, 2010 | 1,122,188 | 22,755 | 1,269,525 | 2,469 | (172,561)
Ending Balance, Shares at Dec. 31, 2010 |  | 182,035 |  |  |
Issuance of stock to employees under benefit plans, net of shares withheld for payroll tax (in shares) |  | 4,185 |  |  |
Issuance of stock to employees under benefit plans, net of shares withheld for payroll tax | 5,088 | 522 | 4,566 |  |
Stock-based compensation expense | 32,337 |  | 32,337 |  |
Repurchase of common stock, shares |  | (2,633) |  |  |
Repurchase of common stock | (31,175) | (329) | (17,770) |  | (13,076)
Stock options issued in purchase acquisition | 4,472 |  | 4,472 |  |
Net income | 369,873 |  |  |  | 369,873
Unrealized gain on marketable securities |  |  |  |  |
Unrealized gain on marketable securities, net of tax of $(169) in 2012, $666 in 2011 and $0 in 2010 | 1,293 |  |  | 1,293 |
Less: reclassification adjustment for gains (losses) included in net income | (1,296) |  |  | (1,296) |
Foreign currency translation adjustment | 2,266 |  |  | 2,266 |
Amortization of prior service costs, net of tax of $(134) in 2012, $9 in 2011 and $ 0 in 2010 | 14 |  |  | 14 |
Ending Balance at Dec. 31, 2011 | 1,505,060 | 22,948 | 1,293,130 | 4,746 | 184,236
Ending Balance, Shares at Dec. 31, 2011 |  | 183,587 |  |  |
Issuance of stock to employees under benefit plans, net of shares withheld for payroll tax (in shares) |  | 4,321 |  |  |
Issuance of stock to employees under benefit plans, net of shares withheld for payroll tax | 6,894 | 540 | 6,354 |  |
Stock-based compensation expense | 39,920 |  | 39,920 |  |
Tax benefit related to stock options and restricted stock units | 8,358 |  | 8,358 |  |
Net income | 217,049 |  |  |  | 217,049
Unrealized gain on marketable securities |  |  |  |  |
Unrealized gain on marketable securities, net of tax of $(169) in 2012, $666 in 2011 and $0 in 2010 | 2,106 |  |  | 2,106 |
Less: reclassification adjustment for gains (losses) included in net income | (799) |  |  | (799) |
Amortization of prior service costs, net of tax of $(134) in 2012, $9 in 2011 and $ 0 in 2010 | (233) |  |  | (233) |
Ending Balance at Dec. 31, 2012 | $ 1,778,355 | $ 23,488 | $ 1,347,762 | $ 5,820 | $ 401,285
Ending Balance, Shares at Dec. 31, 2012 |  | 187,908 |  |  |

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- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate 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 AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section B -Paragraph 11A -Chapter 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 5: 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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- Details
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