Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Goodwill by Segment (Detail)

v3.20.4
Goodwill and Intangible Assets - Goodwill by Segment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]      
Goodwill $ 211,083 $ 198,601 $ 197,892
Clinical Services      
Finite-Lived Intangible Assets [Line Items]      
Goodwill 179,534 179,534  
Pharma Services      
Finite-Lived Intangible Assets [Line Items]      
Goodwill $ 31,549 $ 19,067