Leases - Additional Information (Detail) $ in Thousands	1 Months Ended	9 Months Ended
	Jun. 30, 2019 USD ($) lease	Sep. 30, 2019 USD ($)
Leases [Abstract]
Operating lease renewed | lease	1,000,000
Increase (decrease) in operating lease liability	$ 11,100
Increase (decrease) in operating lease right of use asset	$ 11,100	$ 11,103