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Acquisitions - Future amortization expenses of acquired intangibles (Details) (skobbler, USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
skobbler
 
Business Acquisition [Line Items]  
2014 $ 321
2015 1,281
2016 1,036
2017 1,014
2018 1,014
Thereafter 2,621
Finite-Lived Intangible Assets, Net $ 7,287