Discontinued Operations Balance Sheet, Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014
Current assets:
Accounts receivable—net	$ 20,174
Total inventories	5,883
Prepaid expenses and other current assets	52
Total current assets	26,109
Other assets:
Goodwill	8,923
Other intangible assets	280
Other	89
Property, plant and equipment—net	14,141
Total assets	49,542
Current liabilities:
Accounts payable	9,199
Wages and amounts withheld from employees	1,140
Other current liabilities	301
Total current liabilities	10,640
Net assets of disposal group at fair value	38,902
Accumulated other comprehensive income attributable to disposal group	$ 35,000