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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified | Total | Common Stock | Additional Paid-in Capital | Treasury Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | --- | ---
Balances at Dec. 31, 2010 | $ 1,218,526 | $ 634 | $ 191,674 | $ (423) | $ 1,042,123 | $ (15,482)
Balances (in shares) at Dec. 31, 2010 |  | 63,412,800 |  | 102,635 |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income (loss) | 215,416 |  |  |  | 215,416 |
Other comprehensive income (loss) | 11,202 |  |  |  |  | 11,202
Cash dividends, $ 0.10 per share | (6,382) |  |  |  | (6,382) |
Issuance of common stock under Employee Stock Purchase Plan | 2,300 | 0 | 2,300 |  |  |
Issuance of common stock under Employee Stock Purchase Plan (in shares) |  | 41,358 |  |  |  |
Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings | (9,973) | 3 | (9,976) |  |  |
Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings (in shares) |  | 278,773 |  |  |  |
Issuance of common stock upon stock option exercises | 5,027 | 4 | 5,023 |  |  |
Issuance of common stock upon stock option exercises (in shares) |  | 412,551 |  |  |  |
Stock-based compensation expense | 26,824 |  | 27,945 | (1,121) |  |
Stock-based compensation expense, Shares |  | 0 |  | 21,568 |  |
Balances at Dec. 31, 2011 | 1,462,940 | 641 | 216,966 | (1,544) | 1,251,157 | (4,280)
Balances (in shares) at Dec. 31, 2011 |  | 64,145,482 |  | 81,067 |  |
Common Stock, Dividends, Per Share, Declared | $ 0.10 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income (loss) | (54,249) |  |  |  | (54,249) |
Other comprehensive income (loss) | (4,734) |  |  |  |  | (4,734)
Cash dividends, $ 0.10 per share | (6,511) |  |  |  | (6,511) |
Issuance of common stock under Employee Stock Purchase Plan | 2,776 | 1 | 2,775 |  |  |
Issuance of common stock under Employee Stock Purchase Plan (in shares) |  | 66,485 |  |  |  |
Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings | (21,622) | 9 | (21,631) |  |  |
Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings (in shares) |  | 929,375 |  |  |  |
Issuance of common stock upon stock option exercises | 3,040 | 2 | 3,038 |  |  |
Issuance of common stock upon stock option exercises (in shares) |  | 240,368 |  |  |  |
Conversion of 3.50% Senior Convertible Notes to common stock, including income tax benefit of conversion | 2,641 | 9 | 2,632 |  |  |
Conversion of 3.50% Senior Convertible Notes to common stock, including income tax benefit of conversion (in shares) |  | 864,106 |  |  |  |
Stock-based compensation expense | 30,185 |  | 29,862 | 323 |  |
Stock-based compensation expense, Shares |  | 0 |  | 30,486 |  |
Balances at Dec. 31, 2012 | 1,414,466 | 662 | 233,642 | (1,221) | 1,190,397 | (9,014)
Balances (in shares) at Dec. 31, 2012 |  | 66,245,816 |  | 50,581 |  |
Common Stock, Dividends, Per Share, Declared | $ 0.10 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income (loss) | 170,935 |  |  |  | 170,935 |
Other comprehensive income (loss) | 3,598 |  |  |  |  | 3,598
Cash dividends, $ 0.10 per share | (6,663) |  |  |  | (6,663) |
Issuance of common stock under Employee Stock Purchase Plan | 3,672 | 1 | 3,671 |  |  |
Issuance of common stock under Employee Stock Purchase Plan (in shares) |  | 77,427 |  |  |  |
Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings | (16,220) | 5 | (16,225) |  |  |
Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings (in shares) |  | 526,852 |  |  |  |
Issuance of common stock upon stock option exercises | 3,186 | 3 | 3,183 |  |  |
Issuance of common stock upon stock option exercises (in shares) |  | 228,758 |  |  |  |
Stock-based compensation expense | 32,347 |  | 31,949 | 398 |  |
Stock-based compensation expense, Shares |  | 0 |  | 28,169 |  |
Other income tax benefit | 1,500 |  | 1,500 |  |  |
Balances at Dec. 31, 2013 | $ 1,606,821 | $ 671 | $ 257,720 | $ (823) | $ 1,354,669 | $ (5,416)
Balances (in shares) at Dec. 31, 2013 |  | 67,078,853 |  | 22,412 |  |

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