Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information Other (Detail)

v3.19.2
Commitments and Contingencies - Additional Information Other (Detail) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]    
Other commitment amount $ 9.8 $ 1.0