Annual report pursuant to Section 13 and 15(d)

Goodwill - Additional Information (Detail)

v3.19.1
Goodwill - Additional Information (Detail)
12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Percentage of fair value over carrying value, benchmark for qualitative impairment analysis 94.60%