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3. Intangible Assets, Goodwill and Other (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Goodwill [Line Items]    
Goodwill $ 682,500 $ 682,500
Accumulated impairment loss (335,200) (335,200)
Goodwill, net 347,323 347,343
Clinical Diagnostics [Member]    
Goodwill [Line Items]    
Goodwill 349,200 349,200
Accumulated impairment loss (293,400) (293,400)
Goodwill, net 55,800 55,800
Life Science [Member]    
Goodwill [Line Items]    
Goodwill 333,300 333,300
Accumulated impairment loss (41,800) (41,800)
Goodwill, net $ 291,500 $ 291,500