XML 74 R42.htm IDEA: XBRL DOCUMENT v3.19.3
Goodwill and Intangibles - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Goodwill impairment $ 0 $ 0
Increase in gross carrying amount of intangibles $ 12,600,000