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Acquisitions - Values of assets acquired and liabilities assumed (Details) (USD $)
In Thousands, unless otherwise specified
Jan. 29, 2014
skobbler
Oct. 10, 2012
ThinkNear
Jan. 29, 2014
Customer Relationships
skobbler
Jan. 29, 2014
Developed technology
skobbler
Oct. 10, 2012
Developed technology
ThinkNear
Business Acquisition [Line Items]          
Cash $ 100 $ 181      
Accounts receivable 177 410      
Other assets 209 259      
Finite-lived intangibles     400 7,100 5,100
Goodwill 16,907 14,343      
Liabilities assumed (1,135) (1,858)      
Total value of assets acquired and liabilities assumed $ 23,758 $ 18,435