Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Lessee Lease Description [Line Items]
Short-term lease description	Allows the Company to not recognize leases with a contractual term of less than 12 months on the balance sheet.
Right of use assets for operating leases	$ 84,592	$ 88,000
Lease liabilities for operating leases	84,900	$ 88,200
Lessee, operating lease, not yet commenced, expense	$ 23,400
Minimum [Member]
Lessee Lease Description [Line Items]
Lessee, operating lease, not yet commenced, lease term	3 years
Maximum [Member]
Lessee Lease Description [Line Items]
Lessee, operating lease, not yet commenced, lease term	16 years