Leases - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset	$ 51,675	$ 0
Operating lease liability	51,794
Rent expense	$ 13,400	$ 12,500	$ 13,700
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset				$ 54,000
Operating lease liability				$ 54,000