Long-Term Obligations - Schedule of Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
Debt Instrument [Line Items]
Long-term Debt	$ 201,810	$ 262,414
Long-term Debt, Current Maturities	(42,514)	(61,264)
Long-term obligations, less current maturities	159,296	201,150
Euro-denominated notes payable in 2017 at a fixed rate of 3.71% [Member]
Debt Instrument [Line Items]
Long-term Debt	40,164	39,900
Euro-denominated notes payable in 2020 at a fixed rate of 4.24% [Member]
Debt Instrument [Line Items]
Long-term Debt	60,246	59,850
Usd Denominated Notes Payable Through Two Thousand And Fourteen At Fixed Rate Of Five Point One Four Percentage [Member]
Debt Instrument [Line Items]
Long-term Debt		18,750
USD-denominated notes payable through 2016 at a fixed rate of 5.30% [Member]
Debt Instrument [Line Items]
Long-term Debt	52,286	78,428
USD-denominated notes payable through 2017 at a fixed rate of 5.33% [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 49,114	$ 65,486