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Summary of Significant Accounting Policies and Practices - Schedule of Roll Forward Goodwill (Detail) $ in Thousands | 3 Months Ended
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Aug. 31, 2015 USD ($)
Goodwill [Line Items] |
Balance at beginning of period | $ 107,773
Acquisitions | 155,792
Foreign currency adjustments | (1,371)
Balance at end of Period | 262,194
MS Segment [Member] |
Goodwill [Line Items] |
Balance at beginning of period | 17,466
Acquisitions | 4,060
Foreign currency adjustments | 171
Balance at end of Period | 21,697
IHT Segment [Member] |
Goodwill [Line Items] |
Balance at beginning of period | 60,737
Acquisitions | 151,732
Foreign currency adjustments | (960)
Balance at end of Period | 211,509
Quest Integrity [Member] |
Goodwill [Line Items] |
Balance at beginning of period | 29,570
Foreign currency adjustments | (582)
Balance at end of Period | $ 28,988

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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