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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 $ 90,025 $ 88,567 $ 125,503 $ 133,600 $ 118,485 $ 104,375 $ 147,995 $ 125,033 $ 437,695 $ 495,888 $ 416,223
Unaffiliated Foreign Customers [Member]                      
Segment Reporting Information [Line Items]                      
Foreign net sales to unaffiliated customers                 3,717 2,156 2,984
Unaffiliated Foreign Customers [Member] | Canada [Member]                      
Segment Reporting Information [Line Items]                      
Foreign net sales to unaffiliated customers                 2,711 1,358 2,299
Unaffiliated Foreign Customers [Member] | Other [Member]                      
Segment Reporting Information [Line Items]                      
Foreign net sales to unaffiliated customers                 $ 1,006 $ 798 $ 685