Acquisition (Details) (D and R Technology [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 21, 2012 Estimated Fair Values [Member]
Summary of the estimated fair values of the assets acquired and the liabilities assumed
Current assets		$ 13,839
Property, plant and equipment		8,635
Goodwill		26,991
Amortizable intangible assets		18,330
In-process research and development		500
Other assets		678
Fair value of assets acquired		68,973
Less fair value of liabilities acquired		(5,473)
Net cash paid	$ 63,500	$ 63,500

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Amount of cash paid to acquire the entity.

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The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

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Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

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