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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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-Topic 805

-SubTopic 20

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Amount of liabilities assumed at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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Summary of Purchase Price Allocation (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Goodwill	$ 30,398us-gaap_Goodwill	$ 25,809us-gaap_Goodwill	$ 24,729us-gaap_Goodwill
Purchase price	31,474
Global Thermoelectric Inc
Business Acquisition [Line Items]
Accounts receivable	10,200
Inventory	6,487
Deferred income tax assets, net	3,499
Prepaid expenses and other assets	258
Property and equipment	716
Goodwill	6,258
Assumed liabilities	(6,530)
Net assets acquired	30,759
Cash acquired on acquisition	3,061
Purchase price	33,820
Global Thermoelectric Inc \| Order backlog
Business Acquisition [Line Items]
Intangible assets	815
Global Thermoelectric Inc \| Customer relationships
Business Acquisition [Line Items]
Intangible assets	5,524
Global Thermoelectric Inc \| Technology
Business Acquisition [Line Items]
Intangible assets	2,807
Global Thermoelectric Inc \| Trade Name
Business Acquisition [Line Items]
Intangible assets	$ 725