Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Contingencies And Commitments [Line Items]
Amount paid to implement remedial action work plan		$ 0.4	$ 0.6	$ 4.6
PrimeSource [Member]
Contingencies And Commitments [Line Items]
Litigation settlement and expenses			$ 3.5	$ 3.1
Other Accrued Liabilities and Other Non-current Liabilities [Member]
Contingencies And Commitments [Line Items]
Accrual for reasonably estimable remediation cost		$ 2.9
Discontinued Operations [Member]
Contingencies And Commitments [Line Items]
Accrual charge after remaining estimate of costs to complete remediation	$ 0.5