Income Taxes - Schedule of (Provision for) Benefit from Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Current:
Federal	$ (279)	$ 671	$ 1,652
State and local		148	2,503
Foreign	(1,177)	(1,431)	1,741
Current Income Tax Expense Benefit	(1,456)	(612)	5,896
Deferred:
Federal	(6,461)	(14,181)	36,166
State and local	(175)	(1,079)	764
Foreign	4,110		(44)
Deferred Income Tax Expense Benefit	(2,526)	(15,260)	36,886
(PROVISION FOR) BENEFIT FROM INCOME TAXES	$ (3,982)	$ (15,872)	$ 42,782