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Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2015 | Jan. 31, 2014
Statement Of Other Comprehensive Income [Abstract] |  |  |  |  |  |  |  |
Net income | $ 52,193 us-gaap_NetIncomeLoss |  | $ 45,345 us-gaap_NetIncomeLoss |  | $ 104,808 us-gaap_NetIncomeLoss |  | $ 86,767 us-gaap_NetIncomeLoss |
Other comprehensive income: |  |  |  |  |  |  |  |
Unrealized gain on interest rate swaps, net (a) | 545 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | [1] | 591 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | [1] | 949 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | [1] | 892 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | [1]
Reclassification adjustment of interest rate swaps, net (b) | (294)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax | [2] | (366)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax | [2] | (606)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax | [2] | (744)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax | [2]
Foreign currency translation adjustments | (22,840)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent |  | 737 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent |  | (46,808)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent |  | 15,295 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent |
Total comprehensive income | $ 29,604 us-gaap_ComprehensiveIncomeNetOfTax |  | $ 46,307 us-gaap_ComprehensiveIncomeNetOfTax |  | $ 58,343 us-gaap_ComprehensiveIncomeNetOfTax |  | $ 102,210 us-gaap_ComprehensiveIncomeNetOfTax |
[1] | Net of tax effect of $(298) and $(331) for the three months ended January 31, 2015 and 2014, respectively. Net of tax effect of $(526) and $(495) for the six months ended January 31, 2015 and 2014, respectively.
[2] | Net of tax effect of $157 and $204 for the three months ended January 31, 2015 and 2014, respectively. Net of tax effect of $332 and $412 for the six months ended January 31, 2015 and 2014, respectively.

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=35737396 Reference 3: 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=36458714&loc=d3e557-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 + Details
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