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Goodwill and Intangible Assets - Goodwill (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014 | Dec. 31, 2015 | Mar. 17, 2015 | May. 30, 2014 | Dec. 31, 2013 | Mar. 12, 2013
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill |  | $ 192,381 | $ 199,703 |  |  | $ 150,909 |
Precisive, LLC [Member] |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill |  |  | $ 7,042 | $ 7,042 |  |  |
Granville-Phillips [Member] |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill |  | 41,612 |  |  | $ 42,587 |  |
Acquisition purchase price | $ 975 |  |  |  |  |  |
Alter S.r.l [Member] |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  | $ 381
Acquisition purchase price |  | $ 381 |  |  |  |  |

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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 (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the 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 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e961-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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