Leases - Summary of Information Relates to Operating and Finance Leases Recorded (Detail)	3 Months Ended
	Mar. 31, 2019
Leases [Line Items]
Operating leases, Weighted average remaining lease term	4 years 8 months 12 days
Operating leases, Weighted average discount rate	4.30%
Finance leases, Weighted average remaining lease term	13 years 6 months
Finance leases, Weighted average discount rate	7.80%
Minimum
Leases [Line Items]
Operating leases, Range of remaining lease terms	1 month 6 days
Finance leases, Range of remaining lease terms	2 months 12 days
Maximum
Leases [Line Items]
Operating leases, Range of remaining lease terms	9 years 3 months 18 days
Finance leases, Range of remaining lease terms	14 years 6 months