Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Details)

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Acquisitions (Details)
In Thousands, unless otherwise specified
Dec. 31, 2012
Pyramid Control Systems [Member]
USD ($)
Nov. 30, 2012
Wetzel Holding AG [Member]
USD ($)
Nov. 30, 2012
Wetzel Holding AG [Member]
EUR (€)
Business Acquisition [Line Items]      
Purchase price of acquisition $ 24,532 $ 54,308 € 42,300
Additional purchase price of acquisition $ 3,700 $ 2,825 € 2,200