Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Entity-Wide Disclosure (Details)

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Entity-Wide Disclosure (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Revenue, Net $ 215,244 $ 155,894 $ 117,844
North America [Member]
     
Revenue, Net 113,854 82,373 60,548
Europe and Middle East [Member]
     
Revenue, Net 62,781 49,885 34,572
Asia Pacific [Member]
     
Revenue, Net 35,450 21,506 20,662
Latin America [Member]
     
Revenue, Net $ 3,159 $ 2,130 $ 2,062