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Acquisitions - Preliminary Fair Values of the Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Oct. 21, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Goodwill | $ 340,338 |  | $ 252,520 | $ 260,134
Latchways |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Current assets (including cash of $10.6 million) |  | $ 35,700 |  |
Property, plant and equipment |  | 9,500 |  |
Goodwill |  | 98,000 |  |
Total assets acquired |  | 210,800 |  |
Total liabilities assumed |  | 19,900 |  |
Net assets acquired |  | 190,900 |  |
Cash acquired |  | 10,600 |  |
Trade name and acquired technology | Latchways |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible Assets |  | 14,600 |  |
Customer-related intangibles | Latchways |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible Assets |  | $ 53,000 |  |

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