Contingencies - Additional Information (Detail) $ in Millions		6 Months Ended	12 Months Ended
	Feb. 18, 2015 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($) Employee
Contingencies And Commitments [Line Items]
Estimated total costs to remediate property	$ 8.3
Amount spent to implement remedial action work plan		$ 1.7
Accrual for reasonably estimable remediation cost		5.4	$ 7.1
PrimeSource [Member]
Contingencies And Commitments [Line Items]
Number of employees, litigation filed | Employee			11
Litigation expenses		$ 1.6