Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Site Contingency [Line Items]
Environmental and legal losses	$ 25,800,000	$ 20,900,000
Cash outlays related to legal and environmental matters	$ 1,400,000	2,700,000
Contribution for future response costs	5.00%
Payment of environmental response costs	$ 2,500,000
VAT inflation, penalty and interest charges	0	$ 0
Minimum [Member]
Site Contingency [Line Items]
Environmental and legal losses	25,700,000
Maximum [Member]
Site Contingency [Line Items]
Environmental and legal losses	$ 46,500,000