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Goodwill And Other Intangible Assets (Reconciliation Of Intangible Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2015 | Jul. 31, 2014
Finite-Lived Intangible Assets [Line Items] |  |
Beginning balance, Gross Carrying Amount | $ 81,283 | $ 81,882
Beginning balance, Accumulated Amortization | (45,238) | (40,575)
Beginning balance, Net Intangible Assets | 36,045 | 41,307
Amortization expense, Accumulated Amortization | (6,778) | (5,154)
Amortization expense, Net Intangible Assets | (6,778) | (5,154)
Retirements, Gross Carrying Amount |  | (775)
Retirements, Accumulated Amortization |  | 600
Retirements, Net Intangible Assets |  | (175)
Foreign exchange translation, Gross Carrying Value | (4,193) | 176
Foreign exchange translation, Accumulated Amortization | 2,796 | (109)
Foreign exchange translation, Net Intangible Assets | (1,397) | 67
Ending balance, Gross Carrying Amount | 87,090 | 81,283
Ending balance, Accumulated Amortization | (49,220) | (45,238)
Ending balance, Net Intangible Assets | 37,870 | $ 36,045
Ifil [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible Acquired, Gross Carrying Amount | 3,800 |
Intangible acquired, Net Intangible Assets | 3,800 |
Northern Technical [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible Acquired, Gross Carrying Amount | 6,200 |
Intangible acquired, Net Intangible Assets | $ 6,200 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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