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Business Combinations - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 08, 2016
Jan. 05, 2016
Apr. 30, 2015
Apr. 21, 2015
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2017
Apr. 29, 2014
Acquired Finite-Lived Intangible Assets [Line Items]                    
Purchase price of acquisition           $ 312,158 $ 25,507 $ 20,723    
Goodwill         $ 147,906 327,724 147,906 122,720    
Goodwill, purchase accounting adjustments           1,200        
Provisional accounting, accounts receivable           1,600        
Provisional accounting, inventory           1,100        
Business Combiinations, Provisional Information, Initial Accounting Incomplete, Adjustment for Other Assetsa and Liabilities           (3,900)        
Amortization of intangible assets           36,100 6,900 4,600    
Gain related to contingent liability           600 0 0    
Difference between fair value and carrying value as a gain           0 3,443 $ 0    
Avantec                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Percentage of minority interest                   15.00%
Carrying book value of previous equity interest     $ 1,300              
Aesynt Holding, L.P., Aesynt, Ltd.                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Purchase price of acquisition           271,500        
Cash acquired from Acquisition           8,200        
Goodwill           163,599        
Business Combination, Acquisition Related Costs   $ 9,300     2,900 6,400        
Revenues           155,800        
Operating Income (Loss)           40,500        
Amortization of intangible assets           27,300        
Total purchase price           $ 279,622        
Aesynt Holding, L.P., Aesynt, Ltd. | In-process research and development                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, royalty rate   12.50%                
Aesynt Holding, L.P., Aesynt, Ltd. | Trade name                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, royalty rate   0.50%                
Aesynt Holding, L.P., Aesynt, Ltd. | Customer relationships                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, discount rate   13.00%                
Aesynt Holding, L.P., Aesynt, Ltd. | Backlog                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, discount rate   10.00%                
Aesynt Holding, L.P., Aesynt, Ltd. | Non-compete                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, discount rate   13.00%                
Aesynt Holding, L.P., Aesynt, Ltd. | Maximum                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Research and Development Acquired In Process, Expected Term   3 years                
Aesynt Holding, L.P., Aesynt, Ltd. | Maximum | Developed technology                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, royalty rate           8.00%        
Aesynt Holding, L.P., Aesynt, Ltd. | Minimum                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Research and Development Acquired In Process, Expected Term   2 years                
Aesynt Holding, L.P., Aesynt, Ltd. | Minimum | Developed technology                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, royalty rate           4.00%        
Ateb                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Purchase price of acquisition           $ 40,700        
Cash acquired from Acquisition           900        
Goodwill           20,832        
Business Acquisition, Transaction Costs           1,700        
Revenues           1,700        
Operating Income (Loss)           100        
Amortization of intangible assets           300        
Total purchase price           $ 41,602        
Ateb | Trade name                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, royalty rate           0.50%        
Ateb | Customer relationships                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, discount rate           15.00%        
Ateb | Non-compete                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, discount rate 15.00%                  
Ateb | Maximum | Developed technology                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, royalty rate           6.00%        
Ateb | Minimum | Developed technology                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Fair value inputs, royalty rate           5.00%        
Mach4                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Purchase price of acquisition       $ 16,889            
Goodwill       10,591            
Goodwill, purchase accounting adjustments         100          
Total purchase price       17,286            
Amount placed in escrow fund for business acquisition       $ 2,700            
Avantec                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Purchase price of acquisition     20,749              
Goodwill     15,606              
Total purchase price     $ 24,141              
Period after closing date to settle indemnification and other claims     18 months              
Percentage of interest acquired     85.00%              
Potential earn-out payments     $ 5,600   $ 3,000 $ 3,000 $ 3,000      
Earn out payments made           3,000        
Business acquisition, amount withheld for indemnification     1,800     1,800        
Gain related to contingent liability           $ 600        
Fair value of equity investment     4,700              
Difference between fair value and carrying value as a gain     3,400              
Payments to acquire business, in cash     $ 12,000              
Avantec | Forecast                    
Acquired Finite-Lived Intangible Assets [Line Items]                    
Potential earn-out payments                 $ 2,400