INCOME TAXES (Details 3) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jul. 31, 2013
Deferred tax asset:
Tax loss and tax credit carry-forwards	$ 53,513	$ 43,076
Inventories	10,206	8,658
Compensation and benefits	40,393	39,231
Environmental	7,451	6,745
Accrued expenses	16,393	19,425
Amortization	2,657	2,364
Net pensions	58,431	63,144
Other	4,614	21,487
Gross deferred tax asset	193,658	204,130
Valuation allowance	(38,911)	(25,528)
Total deferred tax asset	154,747	178,602
Deferred tax liability:
Amortization	(45,475)	(36,145)
Plant and equipment	(44,843)	(35,321)
Revenue recognition	(3,098)	(6,948)
Undistributed foreign earnings	(75,955)	(78,360)
Other	(436)	(419)
Total deferred tax liability	(169,807)	(157,193)
Net deferred tax (liability)/asset	(15,060)
Net deferred tax (liability)/asset	$ (15,060)	$ 21,409