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Acquisitions - Summary of Final Fair Values of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Acquisition Date [Line Items] |  |  |
Goodwill | $ 454,612 | $ 443,529 | $ 448,399
As Previously Reported [Member] |  |  |
Acquisition Date [Line Items] |  |  |
Goodwill |  | 450,311 |
Precision Engineered Products Group [Member] |  |  |
Acquisition Date [Line Items] |  |  |
Goodwill |  | 370,904 | 372,709
Current liabilities |  | 21,354 | 21,354
Non-current deferred tax liabilities |  | 94,755 | 95,435
Other non-current liabilities |  | 2,208 | $ 2,208
Precision Engineered Products Group [Member] | As Previously Reported [Member] |  |  |
Acquisition Date [Line Items] |  |  |
Goodwill |  | 8,300 |
Current liabilities |  | 200 |
Non-current deferred tax liabilities |  | 7,900 |
Other non-current liabilities |  | $ 200 |

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- Definition Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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