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Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2015
Finite Lived Intangible Assets [Line Items] |  |
Gross Value | $ 121,885 | $ 108,055
Accumulated Amortization | (53,756) | (59,594)
Total other intangible assets Net | 68,129 | 48,461
Customer relationships |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Value | 77,026 | 68,296
Technology |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Value | 32,467 | $ 29,473
Global Thermoelectric Inc |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Value | 9,406 |
Accumulated Amortization | (1,465) |
Total other intangible assets Net | 7,941 |
Global Thermoelectric Inc | Customer relationships |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Value | 5,264 |
Accumulated Amortization | (334) |
Total other intangible assets Net | $ 4,930 |
Estimated useful life of intangible assets | 12 years |
Global Thermoelectric Inc | Order backlog |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Value | $ 777 |
Accumulated Amortization | $ (777) |
Estimated useful life of intangible assets | 6 months |
Global Thermoelectric Inc | Technology |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Value | $ 2,675 |
Accumulated Amortization | (204) |
Total other intangible assets Net | $ 2,471 |
Estimated useful life of intangible assets | 10 years |
Global Thermoelectric Inc | Trade Name |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Value | $ 690 |
Accumulated Amortization | (150) |
Total other intangible assets Net | $ 540 |
Estimated useful life of intangible assets | 3 years 6 months |

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