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Summary of Significant Accounting Principles and Practices (Details Textual) (USD $)
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12 Months Ended | ||||||||||
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Dec. 31, 2012
Contracts
Segment
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2012
Buildings [Member]
Minimum [Member]
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Dec. 31, 2012
Buildings [Member]
Maximum [Member]
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Dec. 31, 2012
Machinery and Equipment [Member]
Minimum [Member]
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Dec. 31, 2012
Machinery and Equipment [Member]
Maximum [Member]
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Dec. 31, 2012
Test Systems Segment [Member]
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Dec. 31, 2011
Test Systems Segment [Member]
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Dec. 31, 2010
Test Systems Segment [Member]
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Jul. 30, 2012
Max-Viz, Inc [Member]
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| Basis of Presentation (Textual) [Abstract] | |||||||||||
| Percentage of acquired stock | 100.00% | ||||||||||
| Percentage of Revenue Recognized from Long Term Fixed Price Contracts | 37.00% | 70.00% | 95.00% | ||||||||
| Property, Plant and Equipment, Useful Life | 25 years | 40 years | 4 years | 10 years | |||||||
| Basis of Presentation (Additional Textual) [Abstract] | |||||||||||
| Reportable segments | 2 | ||||||||||
| Significant contracts | 0 | ||||||||||
| Research and development, design and related engineering | $ 44,900,000 | $ 36,100,000 | $ 28,300,000 | ||||||||
| Options Granted | 20.00% | ||||||||||
| Excess tax benefits from share based payment arrangements | 1,252,000 | 1,614,000 | 22,000 | ||||||||
| Depreciation expense | 4,400,000 | 4,000,000 | 3,800,000 | ||||||||
| Goodwill impairment charge | 0 | 2,400,000 | 0 | 0 | 2,400,000 | 0 | |||||
| Cash dividends | $ 0 | ||||||||||
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Number of significant contracts allowing right of return. No definition available.
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| X | ||||||||||
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- Definition
Percentage of revenue recognized from long term fixed price contracts. No definition available.
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| X | ||||||||||
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- Definition
Share based compensation arrangement by share based payment award annual vesting percentage No definition available.
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| X | ||||||||||
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- Definition
Percentage of voting equity interests acquired in the business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of excess tax benefit (tax deficiency) that arises when compensation cost from non-qualified share-based compensation recognized on the entity's tax return exceeds (is less than) compensation cost from equity-based compensation recognized in financial statements. Excess tax benefit (tax deficiency) increases (decreases) net cash provided by financing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. No definition available.
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| X | ||||||||||
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- Definition
Cash outflow in the form of ordinary dividends to common shareholders, generally out of earnings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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| X | ||||||||||
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- Definition
The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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