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Acquisitions - Summary of Purchase Price (Detail) - USD ($) $ in Thousands |  | 9 Months Ended
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Apr. 29, 2016 | Sep. 30, 2016 | Sep. 30, 2015
Business Acquisition [Line Items] |  |  |
Total purchase price, net of cash and cash equivalents acquired |  | $ 939,591 | $ 9,910
Newport [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Cash paid for outstanding shares | $ 905,254 |  |
Settlement of share-based compensation awards | 8,824 |  |
Cash paid for Newport debt | 93,200 |  |
Total purchase price | 1,007,278 |  |
Less: Cash and cash equivalents acquired | (61,463) |  |
Total purchase price, net of cash and cash equivalents acquired | $ 945,815 |  |

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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