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Acquisitions Acquisitions (Intangible Assets Acquired as Part of Business Combination) (Details) - USD ($)
$ in Thousands
Dec. 08, 2019
Aug. 23, 2019
Silicon IP and Business Protocols Business from Verimatrix    
Identified intangible assets assumed in the acquisitions    
Identified intangible assets assumed $ 23,500  
Indefinite-lived Intangible Assets Acquired 1,000  
Silicon IP and Business Protocols Business from Verimatrix | Existing technology    
Identified intangible assets assumed in the acquisitions    
Identified intangible assets assumed 21,600  
Silicon IP and Business Protocols Business from Verimatrix | Customer contracts and contractual relationships    
Identified intangible assets assumed in the acquisitions    
Identified intangible assets assumed $ 900  
Identified intangible assets assumed, weighted-average useful life 5 years  
Northwest Logic    
Identified intangible assets assumed in the acquisitions    
Identified intangible assets assumed   $ 8,800
Northwest Logic | Existing technology    
Identified intangible assets assumed in the acquisitions    
Identified intangible assets assumed   $ 8,100
Identified intangible assets assumed, weighted-average useful life   5 years
Northwest Logic | Customer contracts and contractual relationships    
Identified intangible assets assumed in the acquisitions    
Identified intangible assets assumed   $ 400
Identified intangible assets assumed, weighted-average useful life   2 years
Northwest Logic | Customer backlog    
Identified intangible assets assumed in the acquisitions    
Identified intangible assets assumed   $ 300
Identified intangible assets assumed, weighted-average useful life   6 months
Minimum | Silicon IP and Business Protocols Business from Verimatrix | Existing technology    
Identified intangible assets assumed in the acquisitions    
Identified intangible assets assumed, weighted-average useful life 3 years  
Maximum | Silicon IP and Business Protocols Business from Verimatrix | Existing technology    
Identified intangible assets assumed in the acquisitions    
Identified intangible assets assumed, weighted-average useful life 5 years