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Goodwill and Intangible Assets - Intangible Assets (Parenthetical) (Detail) - USD ($) $ in Thousands |  | 6 Months Ended |
--- | --- | --- | ---
Feb. 01, 2019 | Jun. 30, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |
Accumulated Amortization |  | $ 273,862 | $ 244,025
Customer Relationships [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Accumulated Amortization |  | 73,888 | 63,788
Patents, Trademarks, Trade Names and Other [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Accumulated Amortization |  | 42,567 | $ 42,954
Electro Scientific Industries Inc [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Acquired intangible assets, purchase price | $ 316,200 | 316,200 |
Finite lived intangible asset , gross favorable lease |  | 6,428 |
Electro Scientific Industries Inc [Member] | Customer Relationships [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Acquired intangible assets, purchase price | $ 25,400 | 25,400 |
Electro Scientific Industries Inc [Member] | Patents, Trademarks, Trade Names and Other [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Accumulated Amortization |  | 3,445 |
Electro Scientific Industries Inc [Member] | Completed Technology [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Acquired intangible assets, purchase price |  | 274,000 |
Electro Scientific Industries Inc [Member] | Trademarks Tradenames and Backlog [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Acquired intangible assets, purchase price |  | $ 16,800 |

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