Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Additional Information (Detail)

v3.10.0.1
Property, Plant and Equipment - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Abstract]      
Capitalized interest costs $ 0.1 $ 0.1 $ 1.1
Assets recorded under capital lease obligation 8.1 7.6  
Accumulated depreciation on capital lease obligation $ 6.0 $ 4.3