Exit Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Restructuring Cost and Reserve [Line Items]
Exit costs, incurred	$ 719	$ 682
Exit costs, cumulative	1,401
Exit costs, expected to be incurred	1,401
Termination Costs [Abstract]
Exit liabilities, beginning of period	112	0
Additions	126	682
Payments/settlements	(238)	(570)
Exit liabilities, end of period	0	112
Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Exit costs, incurred	304	615
Exit costs, cumulative	919
Exit costs, expected to be incurred	919
Other Associated Costs [Member]
Restructuring Cost and Reserve [Line Items]
Exit costs, incurred	415	$ 67
Exit costs, cumulative	482
Exit costs, expected to be incurred	$ 482