ACCRUED AND OTHER NON-CURRENT LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012		Jul. 31, 2011
Other Liabilities Disclosure [Abstract]
Payroll and related taxes	$ 132,024		$ 148,063
Customer advances	47,583		40,203
Benefits	19,594		18,549
Interest payable	20,441		7,257
Environmental remediation	2,631	[1]	2,985	[1]
Deferred income taxes	1,052	[2]	1,188	[2]
Other	157,141		76,240
Accrued liabilities	$ 380,466		$ 294,485

[1] For further discussion regarding environmental remediation liabilities refer to Note 14, Contingencies and Commitments.

[2] See Note 11, Income Taxes, for further discussion.