Notes Payable Notes Payable - Schedule of Borrowings (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2014 Rate	Jul. 31, 2014 Rate
Short-term Debt [Line Items]
Notes payable	$ 94,708	$ 61,422
Short-term Debt, Weighted Average Interest Rate	1.713%	2.0311%
USD-denominated credit facility China [Member] | China, Yuan Renminbi
Short-term Debt [Line Items]
Notes payable	11,708	12,499
Short-term Debt, Weighted Average Interest Rate	5.04%	5.04%
USD-denominated credit facility China [Member] | United States of America, Dollars
Short-term Debt [Line Items]
Notes payable		6,923
Short-term Debt, Weighted Average Interest Rate		1.3548%
USD-Denominated Borrowing Credit Revolver [Member]
Short-term Debt [Line Items]
Notes payable	$ 83,000	$ 42,000
Short-term Debt, Weighted Average Interest Rate	1.2438%	1.2472%