Other (Expense) Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Other (Expense) Income, Net [Abstract]
Foreign currency transaction (losses) gains	$ (1,096)	$ 322	$ (2,258)	$ 1,089
(Loss) gain on marketable securities		(16)	543	(57)
Gain (loss) on investments	$ 236	(439)	80	1,459
Other	626	1,100	791	(201)
Total other (expense) income, net	$ (234)	$ 967	$ (844)	$ 2,290