Fair Value Measurements (Details) (USD $) In Thousands	Jul. 31, 2011	Jul. 31, 2010
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total Assets	$ 10,916	$ 8,937
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total Liabilities	114,112	98,640
Other Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Trading Securities	10,897	8,757
Other Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Trading Securities	10,897	8,757
Other Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Trading Securities	0	0
Other Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Trading Securities	0	0
Prepaid expenses and other current assets [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	3	24
Prepaid expenses and other current assets [Member] | Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0	0
Prepaid expenses and other current assets [Member] | Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	3	24
Prepaid expenses and other current assets [Member] | Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0	0
Prepaid expenses and other current assets [Member] | Foreign exchange contracts - cash flow hedges [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	16	156
Prepaid expenses and other current assets [Member] | Foreign exchange contracts - cash flow hedges [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0	0
Prepaid expenses and other current assets [Member] | Foreign exchange contracts - cash flow hedges [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	16	156
Prepaid expenses and other current assets [Member] | Foreign exchange contracts - cash flow hedges [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0	0
Other Current Liabilities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts		0
Other Current Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Contract [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0
Other Current Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign exchange contracts - cash flow hedges [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0	0
Other Current Liabilities [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign currency denominated debt - net investment hedge [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0
Long Term Obligations Less Current Maturities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts		0
Long Term Obligations Less Current Maturities [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign currency denominated debt - net investment hedge [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total Assets	10,897	8,757
Fair Value, Inputs, Level 1 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total Liabilities	0	0
Other Current Liabilities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts		64
Other Current Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Contract [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	2
Other Current Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign exchange contracts - cash flow hedges [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	830	829
Other Current Liabilities [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign currency denominated debt - net investment hedge [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	5,295
Long Term Obligations Less Current Maturities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts		97,747
Long Term Obligations Less Current Maturities [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign currency denominated debt - net investment hedge [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	107,985
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total Assets	19	180
Fair Value, Inputs, Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total Liabilities	114,112	98,640
Other Current Liabilities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts		0
Other Current Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Contract [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0
Other Current Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign exchange contracts - cash flow hedges [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0	0
Other Current Liabilities [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign currency denominated debt - net investment hedge [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0
Long Term Obligations Less Current Maturities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts		0
Long Term Obligations Less Current Maturities [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign currency denominated debt - net investment hedge [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total Assets	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total Liabilities	0	0
Other Current Liabilities [Member] | Foreign Exchange Contract [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	2
Other Current Liabilities [Member] | Foreign exchange contracts - cash flow hedges [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	830	829
Other Current Liabilities [Member] | Foreign currency denominated debt - net investment hedge [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	5,295
Long Term Obligations Less Current Maturities [Member] | Foreign currency denominated debt - net investment hedge [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts	107,985	97,747
Other Current Liabilities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Financial Statement Captions [Line Items]
Foreign exchange contracts		$ 64