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Consolidated Statements of Stockholders' Equity (USD $) In Thousands | Total | Common Stock | Retained Earnings | Accumulated Other Comprehensive Income, Net
--- | --- | --- | --- | ---
Beginning Balance, Shares at Apr. 30, 2008 |  | 44,593 |  |
Beginning Balance at Apr. 30, 2008 | $ 496,679 | $ 358,568 | $ 95,014 | $ 43,097
Comprehensive income (loss): |  |  |  |
Net income (loss) | (10,092) |  | (10,092) |
Other comprehensive income (loss), net of tax: |  |  |  |
Unrealized gain (loss) on marketable securities | (3,624) |  |  | (3,624)
Reclassification of unrealized losses on marketable securities, net of taxes to other-than-temporary impairment and upon transfer of securities from available-for-sale to trading | 5,514 |  |  | 5,514
Foreign currency translation adjustments | (40,685) |  |  | (40,685)
Defined benefit pension plan | 1,983 |  |  | 1,983
Total comprehensive income (loss) | (46,904) |  |  |
Purchase of stock | (9,588) | (9,588) |  |
Purchase of stock, Shares |  | (709) |  |
Issuance of stock | 3,609 | 3,609 |  |
Issuance of stock, Shares |  | 845 |  |
Stock-based compensation | 16,495 | 16,495 |  |
Tax benefit (expense) from exercise of stock options | (654) | (654) |  |
Ending Balance, Shares at Apr. 30, 2009 |  | 44,729 |  |
Ending Balance at Apr. 30, 2009 | 459,637 | 368,430 | 84,922 | 6,285
Comprehensive income (loss): |  |  |  |
Net income (loss) | 5,298 |  | 5,298 |
Other comprehensive income (loss), net of tax: |  |  |  |
Foreign currency translation adjustments | 15,377 |  |  | 15,377
Defined benefit pension plan | (8,728) |  |  | (8,728)
Total comprehensive income (loss) | 11,947 |  |  |
Purchase of stock | (3,136) | (3,136) |  |
Purchase of stock, Shares |  | (226) |  |
Issuance of stock | 6,526 | 6,526 |  |
Issuance of stock, Shares |  | 1,476 |  |
Stock-based compensation | 17,508 | 17,508 |  |
Tax benefit (expense) from exercise of stock options | (611) | (611) |  |
Ending Balance, Shares at Apr. 30, 2010 |  | 45,979 |  |
Ending Balance at Apr. 30, 2010 | 491,871 | 388,717 | 90,220 | 12,934
Comprehensive income (loss): |  |  |  |
Net income (loss) | 58,874 |  | 58,874 |
Other comprehensive income (loss), net of tax: |  |  |  |
Unrealized gain (loss) on marketable securities | 35 |  |  | 35
Foreign currency translation adjustments | 16,739 |  |  | 16,739
Defined benefit pension plan | (4,048) |  |  | (4,048)
Total comprehensive income (loss) | 71,600 |  |  |
Exercise of warrants | 2,983 | 2,983 |  |
Exercise of warrants, Shares |  | 274 |  |
Purchase of stock | (13,844) | (13,884) |  |
Purchase of stock, Shares |  | (934) |  |
Issuance of stock | 10,084 | 10,084 |  |
Issuance of stock, Shares |  | 1,684 |  |
Stock-based compensation | 15,476 | 15,476 |  |
Tax benefit (expense) from exercise of stock options | 1,287 | 1,287 |  |
Payment of dividends by majority owned consolidated subsidiaries | (600) |  | (600) |
Ending Balance, Shares at Apr. 30, 2011 |  | 47,003 |  |
Ending Balance at Apr. 30, 2011 | $ 578,857 | $ 404,703 | $ 148,494 | $ 25,660

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