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Schedule of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified |  |  |  | 9 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2014 Global Thermoelectric Inc | Sep. 30, 2014 Customer Relationships Global Thermoelectric Inc | Sep. 30, 2014 Order backlog Global Thermoelectric Inc | Sep. 30, 2014 Technology Global Thermoelectric Inc | Sep. 30, 2014 Trade Names Global Thermoelectric Inc
Finite Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Value |  |  | $ 9,751 | $ 5,457 | $ 805 | $ 2,773 | $ 716
Accumulated Amortization |  |  | (1,278) | (230) | (805) | (140) | (103)
Net Value | $ 77,277 | $ 83,431 | $ 8,473 | $ 5,227 |  | $ 2,633 | $ 613
Useful Life |  |  |  | 12 years | 6 months | 10 years | 3 years 6 months

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