Acquisitions (Schedule Of Identifiable Assets Acquired And Liabilities Assumed At Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2014	Jul. 31, 2014	Sep. 30, 2014 Northern Technical [Member]
Business Acquisition [Line Items]
Cash and cash equivalents			$ 431
Accounts receivable			1,083
Inventories			7,775
Other current assets			934
Property, plant, and equipment, net			21,829
Goodwill	221,874	166,406	59,177
Intangible assets, net			8,257
Other assets and deferred taxes			221
Total assets acquired			99,707
Trade accounts payable			149
Other current liabilities			1,508
Total liabilities assumed			1,657
Net assets acquired			$ 98,050