Discontinued Operations Discontinued Operations - Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales				$ 0
Loss from operations of discontinued businesses				(1,201)
Income tax expense				(288)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax				(487)
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation				61
Loss from discontinued operations, net of income tax	$ 0	$ 0	$ 0	$ (1,915)