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Comprehensive Income (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 29, 2012 | Feb. 28, 2011 | Feb. 29, 2012 | Feb. 28, 2011
Comprehensive Income |  |  |  |
Net income | $ 76,035,000 | $ 59,070,000 | $ 219,023,000 | $ 176,213,000
Other comprehensive income: |  |  |  |
Foreign currency translation adjustment | 11,203,000 | 15,472,000 | (9,343,000) | 28,846,000
Change in fair value of derivatives | 304,000 | (152,000) | 485,000 | (777,000)
Amortization of interest rate lock agreements | 377,000 | 192,000 | 1,131,000 | 575,000
Change in fair value of available- for-sale securities | (29,000) | (10,000) | (4,000) | 18,000
Comprehensive income | 87,890,000 | 74,572,000 | 211,292,000 | 204,875,000
Comprehensive income tax expenses and benefits |  |  |  |
Tax expense (benefit) for change in the fair value of derivatives | 200,000 |  | 300,000 | (500,000)
Less than |  |  |  |
Comprehensive income tax expenses and benefits |  |  |  |
Tax expense (benefit) for change in the fair value of derivatives |  | (100,000) |  |
Tax benefit for change in fair value of available-for-sale securities | $ (100,000) | $ (100,000) | $ (100,000) | $ 100,000

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- Definition The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e540-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 30 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A5 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(3) -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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 8, 9, 10, 11, 12, 13, 14 -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6508144 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e557-108580 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 + Details
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