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Amortizable of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | May 31, 2014 | May 31, 2013
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 54,143 | $ 35,283
Less Accumulated Amortization | 17,409 | 13,668
Net Carrying Amount | 36,734 | 21,615
Licenses |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 6,701 | 4,165
Less Accumulated Amortization | 1,873 | 1,409
Net Carrying Amount | 4,828 | 2,756
Noncompete Agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 474 | 334
Less Accumulated Amortization | 256 | 186
Net Carrying Amount | 218 | 148
Patents |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 5,990 | 5,184
Less Accumulated Amortization | 2,746 | 2,363
Net Carrying Amount | 3,244 | 2,821
Customer Relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 37,145 | 21,791
Less Accumulated Amortization | 11,915 | 9,446
Net Carrying Amount | 25,230 | 12,345
Other product and service-related intangibles |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 3,833 | 3,809
Less Accumulated Amortization | 619 | 264
Net Carrying Amount | $ 3,214 | $ 3,545

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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