Leases - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Line Items]
Operating leases, options to extend lease term	9 years
Increase in operating ROU assets	$ 3,000
Increase in operating lease liabilities	$ 3,000
Minimum [Member]
Leases [Line Items]
Remaining lease term, operating lease	1 year
Lessor sales-type, lease term	3 years
Maximum [Member]
Leases [Line Items]
Remaining lease term, operating lease	14 years
Operating leases, options to extend lease term	5 years
Operating leases, options to terminate lease term	1 year
Lessor sales-type, lease term	5 years