Employee Benefit Plans - Schedule of Changes in Accumulated Benefit Obligations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	$ 13,023	$ 14,225
Service cost	674	770	644
Interest cost	534	476	633
Actuarial (gain)/loss	(4,691)	(1,745)
Benefit payments	(473)	(703)
Plan amendments	(1,011)	0
Obligation at end of fiscal year	$ 8,056	$ 13,023	$ 14,225