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Inventories (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Inventory, Net [Abstract]      
Unpaid inventory $ 59,400 $ 64,400 $ 45,600
Reagent rental programs      
Inventory [Line Items]      
Rental and operating-type reagent rental program instruments transferred from inventory to property and equipment $ 17,407 $ 11,628 $ 9,645