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Segment Information - Net Sales to Foreign Customers (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]                      
Foreign net sales to unaffiliated customers $ 157,021 $ 163,617 $ 192,345 $ 198,798 $ 187,258 $ 177,860 $ 210,746 $ 185,382 $ 711,781 $ 761,246 $ 701,241
Unaffiliated Customers [Member]                      
Segment Reporting Information [Line Items]                      
Foreign net sales to unaffiliated customers                 28,284 31,976 34,154
Unaffiliated Customers [Member] | Canada [Member]                      
Segment Reporting Information [Line Items]                      
Foreign net sales to unaffiliated customers                 17,856 19,334 19,976
Unaffiliated Customers [Member] | Other [Member]                      
Segment Reporting Information [Line Items]                      
Foreign net sales to unaffiliated customers                 $ 10,428 $ 12,642 $ 14,178