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Business Segment, Geographic Area, Product and Significant Customer Information - Goodwill Associated with Reportable Segments (Detail) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Goodwill | $ 200,212 | $ 192,381 | $ 150,909
Operating Segments [Member] | Advanced Manufacturing Capital Equipment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Goodwill | 174,344 | 166,946 |
Operating Segments [Member] | Global Service [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Goodwill | 19,826 | 19,728 |
Operating Segments [Member] | Other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Goodwill | 6,228 | 6,228 |
Foreign Currency Translation [Member] | Segment Reconciling Items [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Goodwill | $ (186) | $ (521) |

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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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