Employee Benefit Plans - Schedule of Changes in Accumulated Benefit Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Obligation at beginning of year	$ 8,056	$ 13,023
Service cost	210	674	$ 770
Interest cost	222	534	476
Actuarial (gain) loss	502	(4,691)
Benefit payments	(365)	(473)
Plan amendments	(1,935)	(1,011)
Curtailment gain	(2,555)	0
Obligation at end of fiscal year	$ 4,135	$ 8,056	$ 13,023