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Acquired Intangible Assets, Identifiable Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Indefinite Lived Intangible Assets [Abstract]    
Total acquired intangible assets $ 184,362 $ 123,636
Less accumulated amortization [1] (76,491) (70,221)
Net acquired intangible assets 107,871 53,415
Customer Relationships [Member]    
Indefinite Lived Intangible Assets [Abstract]    
Total acquired intangible assets 157,119 111,701
Patents, Developed Technology and Intellectual Property [Member]    
Indefinite Lived Intangible Assets [Abstract]    
Total acquired intangible assets 14,123 723
Trademarks and Trade Names [Member]    
Indefinite Lived Intangible Assets [Abstract]    
Total acquired intangible assets 8,880 6,980
Acquired indefinite-lived intangible assets 2,600  
Non-compete Agreements [Member]    
Indefinite Lived Intangible Assets [Abstract]    
Total acquired intangible assets 3,280 3,272
Supply Agreements [Member]    
Indefinite Lived Intangible Assets [Abstract]    
Total acquired intangible assets 800 800
Leaseholds [Member]    
Indefinite Lived Intangible Assets [Abstract]    
Total acquired intangible assets $ 160 $ 160
[1] Applies to all intangible assets, except for trademarks and trade names totaling $2.6 million, which have indefinite useful lives and, as such, are not being amortized.