Leases - Additional Information (Detail)	3 Months Ended
	Dec. 31, 2019
Minimum
Lessee Lease Description [Line Items]
Operating lease expiration year	2020
Operating lease, term of contract	1 year
Maximum
Lessee Lease Description [Line Items]
Operating lease expiration year	2039
Operating lease, term of contract	20 years
Operating lease, option to extend, term	5 years