Leases - Additional Information (Detail) - USD ($) $ in Millions		9 Months Ended
	Jan. 01, 2019	Sep. 30, 2019
Lessee Lease Description [Line Item]
Operating lease, existence of option to terminate [true false]		true
Operating lease, existence of option to extend [true false]		true
Operating lease, existence of option to retract [true false]		true
Minimum [Member]
Lessee Lease Description [Line Item]
Operating lease, remaining lease term		2 months
Maximum
Lessee Lease Description [Line Item]
Operating lease, remaining lease term		11 years
Maximum | ASU 2016-02
Lessee Lease Description [Line Item]
Cumulative effect adjustment on retained earnings	$ 0.1