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Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Total | Common Stock | Paid-In Capital | Retained Earnings | Other Accumulated Comprehensive Income (Loss) | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance at May. 31, 2009 | $ 2,367,409 | $ 129,215 | $ 72,364 | $ 2,938,419 | $ 25,299 | $ (797,888)
Balance (in shares) at May. 31, 2009 |  | 173,086 |  |  |  | (20,296)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 215,620 |  |  | 215,620 |  |
Equity adjustment for foreign currency translation | 9,365 |  |  |  | 9,365 |
Change in fair value of derivatives, net of ($260), $3,813, and $3,091 of tax expense (benefit) | 443 |  |  |  | 443 |
Amortization of interest rate lock agreements | 767 |  |  |  | 767 |
Change in fair value of available-for-sale securities, net of $14, $0, and ($13) of tax expense (benefit) | (28) |  |  |  | (28) |
Comprehensive income, net of tax | 226,167 |  |  |  |  |
Dividends | (73,960) |  |  | (73,960) |  |
Stock-based compensation | 15,349 |  | 15,349 |  |  |
Vesting of stock-based compensation awards (in shares) |  | 121 |  |  |  |
Vesting of stock-based compensation awards |  | 2,843 | (2,843) |  |  |
Stock options exercised, net of shares surrendered (in shares) | 0 |  |  |  |  |
Repurchase of common stock (in shares) |  |  |  |  |  | (42)
Repurchase of common stock | (969) |  |  |  |  | (969)
Other | 33 |  | (254) |  | 287 |
Balance at May. 31, 2010 | 2,534,029 | 132,058 | 84,616 | 3,080,079 | 36,133 | (798,857)
Balance (in shares) at May. 31, 2010 |  | 173,207 |  |  |  | (20,338)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 246,989 |  |  | 246,989 |  |
Equity adjustment for foreign currency translation | 27,344 |  |  |  | 27,344 |
Change in fair value of derivatives, net of ($260), $3,813, and $3,091 of tax expense (benefit) | (6,096) |  |  |  | (6,096) |
Amortization of interest rate lock agreements | 767 |  |  |  | 767 |
Change in fair value of available-for-sale securities, net of $14, $0, and ($13) of tax expense (benefit) | 3 |  |  |  | 3 |
Comprehensive income, net of tax | 269,007 |  |  |  |  |
Dividends | (71,812) |  |  | (71,812) |  |
Stock-based compensation | 15,203 |  | 15,203 |  |  |
Vesting of stock-based compensation awards (in shares) |  | 139 |  |  |  |
Vesting of stock-based compensation awards |  | 3,343 | (3,343) |  |  |
Stock options exercised, net of shares surrendered (in shares) | 0 |  |  |  |  |
Repurchase of common stock (in shares) |  |  |  |  |  | (15,424)
Repurchase of common stock | (443,690) |  |  |  |  | (443,690)
Other | (88) |  | (744) |  | 656 |
Balance at May. 31, 2011 | 2,302,649 | 135,401 | 95,732 | 3,255,256 | 58,807 | (1,242,547)
Balance (in shares) at May. 31, 2011 |  | 173,346 |  |  |  | (35,762)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 297,637 |  |  | 297,637 |  |
Equity adjustment for foreign currency translation | (17,815) |  |  |  | (17,815) |
Change in fair value of derivatives, net of ($260), $3,813, and $3,091 of tax expense (benefit) | (5,286) |  |  |  | (5,286) |
Amortization of interest rate lock agreements | 1,508 |  |  |  | 1,508 |
Change in fair value of available-for-sale securities, net of $14, $0, and ($13) of tax expense (benefit) | 24 |  |  |  | 24 |
Comprehensive income, net of tax | 276,068 |  |  |  |  |
Dividends | (70,820) |  |  | (70,820) |  |
Stock-based compensation | 20,312 |  | 20,312 |  |  |
Vesting of stock-based compensation awards (in shares) |  | 297 |  |  |  |
Vesting of stock-based compensation awards |  | 9,513 | (9,513) |  |  |
Stock options exercised, net of shares surrendered (in shares) |  | 103 |  |  |  |
Stock options exercised, net of shares surrendered | 3,341 | 3,341 |  |  |  |
Repurchase of common stock (in shares) |  |  |  |  |  | (11,464)
Repurchase of common stock | (392,328) |  |  |  |  | (392,328)
Other | (87) |  | 488 |  | (575) |
Balance at May. 31, 2012 | $ 2,139,135 | $ 148,255 | $ 107,019 | $ 3,482,073 | $ 36,663 | $ (1,634,875)
Balance (in shares) at May. 31, 2012 |  | 173,746 |  |  |  | (47,226)

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