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Acquisitions and Dispositions - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 29, 2016 | Dec. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017
Acquisition Date [Line Items] |  |  |  |
Goodwill |  | $ 588,585 | $ 586,996 | $ 591,047
Total purchase price, net of cash and cash equivalents acquired |  | $ 939,591 |  |
Newport [Member] |  |  |  |
Acquisition Date [Line Items] |  |  |  |
Current assets (including cash) | $ 186,137 |  |  |
Inventory | 142,714 |  |  |
Intangible assets | 404,506 |  |  |
Goodwill | 396,027 |  |  |
Property, plant and equipment | 119,932 |  |  |
Long-term assets | 22,725 |  |  |
Total assets acquired | 1,272,041 |  |  |
Current liabilities | 95,156 |  |  |
Intangible liability | 4,302 |  |  |
Other long-term liabilities | 165,305 |  |  |
Total liabilities assumed | 264,763 |  |  |
Fair value of assets acquired and liabilities assumed | 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 currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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