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Acquisition Acquisition Textual (Details) (USD $)
3 Months Ended 0 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 09, 2013
Discera, Inc. [Member]
Sep. 30, 2013
Developed Technology and Customer Relationship [Member]
Sep. 30, 2013
Noncompete Agreements [Member]
Sep. 30, 2013
Trademarks [Member]
Business Acquisition [Line Items]          
Business Combination, Consideration Transferred   $ 7,100,000      
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred   1,100,000      
Payments to Acquire Businesses, Gross   6,100,000      
Business Combination, Indemnification Assets, Amount as of Acquisition Date   1,000,000      
Business Combination, Acquisition Related Costs $ 173,000        
Identafiable intangible assets estimated useful life     10 years 1 year 2 years