Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Right-of-use operating lease asset	$ 29.0
Operating lease liability	$ 28.4
Accounting Standards Update 2016-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Right-of-use operating lease asset		$ 35.1
Operating lease liability		$ 34.5