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Acquisitions (Details) - USD ($)
$ in Thousands
Jul. 02, 2014
Jul. 01, 2014
Jun. 30, 2016
Apr. 30, 2016
Dec. 31, 2015
Business Acquisition [Line Items]          
Deferred Compensation Arrangement with Individual, Recorded Liability         $ 1,719
Business Combination, Indemnification Assets, Amount as of Acquisition Date $ 6,000        
Videotel [Member]          
Business Acquisition [Line Items]          
Business Combination, Contingent Consideration, Liability $ 47,446        
Business combination, consideration transferred, percentage held in escrow   10.00%      
Business combination, consideration transferred, period escrow held 21 months        
Scenario, Plan [Member]          
Business Combination, Pro Forma Information [Abstract]          
Business Combination, Consideration Transferred, Escrow Released     $ 1,600 $ 4,400  
Scenario, Plan [Member] | Accounts receivable write-offs [Member]          
Business Combination, Pro Forma Information [Abstract]          
Business Combination, Consideration Transferred, Escrow Released       $ 600