Quarterly report pursuant to Section 13 or 15(d)

Amortizable Intangible Assets - Additional Information (Detail)

v3.19.3
Amortizable Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]        
Amortization of intangible assets $ 1.1 $ 1.6 $ 3.5 $ 4.6