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Allocation of Final Purchase Price (Detail) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Jun. 11, 2015 | Dec. 31, 2014 | Oct. 31, 2014
--- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |
Goodwill | $ 223,343 | $ 488,413 |  | $ 273,438 |
Universal Robots |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  | $ 221,128 |  |
Intangible assets |  |  | 121,590 |  |
Current assets |  |  | 10,853 |  |
Non-current assets |  |  | 3,415 |  |
Accounts payable and current liabilities |  |  | (11,976) |  |
Long-term deferred tax liabilities |  |  | (26,653) |  |
Long-term other liabilities |  |  | (2,920) |  |
Total purchase price |  |  | $ 315,437 |  |
Avionics Interface Technologies, LLC |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  |  |  | $ 10,516
Intangible assets |  |  |  |  | 9,080
Current assets |  |  |  |  | 2,452
Non-current assets |  |  |  |  | 359
Accounts payable and current liabilities |  |  |  |  | (1,164)
Total purchase price |  |  |  |  | $ 21,243

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