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Pro Forma Results Under Acquisition (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Universal Robots |  |  |
Business Acquisition [Line Items] |  |  |
Revenue | $ 1,657,626 | $ 1,686,689 |
Net income | $ 199,784 | $ 61,078 |
Net income per common share, basic | $ 0.94 | $ 0.30 |
Net income per common share, diluted | $ 0.94 | $ 0.27 |
Avionics Interface Technologies, LLC |  |  |
Business Acquisition [Line Items] |  |  |
Revenue |  | $ 1,655,038 | $ 1,434,699
Net income |  | $ 82,169 | $ 164,087
Net income per common share, basic |  | $ 0.40 | $ 0.86
Net income per common share, diluted |  | $ 0.37 | $ 0.70
ZTEC Instruments, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Revenue |  |  | $ 1,431,270
Net income |  |  | $ 163,394
Net income per common share, basic |  |  | $ 0.86
Net income per common share, diluted |  |  | $ 0.69

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