Selected Quarterly Financial Data - Schedule of Selected Quarterly Financial Data (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Selected Quarterly Financial Information [Abstract]                      
Net sales $ 1,122,401 $ 1,305,493 $ 1,340,935 $ 1,359,132 $ 1,245,111 $ 1,308,959 $ 1,361,759 $ 1,391,585 $ 5,127,961 $ 5,307,414 $ 5,451,909
Gross profit 38,046 68,236 92,410 98,629 115,181 96,517 65,509 80,803 297,321 358,010 336,721
Equity in earnings of unconsolidated affiliates 18,154 9,267 5,378 14,950 12,195 15,215 8,929 2,799 47,749 39,138 27,140
Operating Income (4,035) 29,390 23,580 63,549 65,524 57,960 19,664 37,142 112,484 180,290 181,792
Income (loss) before income taxes (31,818) (6,460) (39,171) 29,836 24,386 10,937 (25,914) (9,778) (47,613) (369) 47,842
Net income (loss) $ (29,687) $ (10,110) $ (44,621) $ 17,086 $ 10,588 $ 4,936 $ (28,064) $ (9,678) $ (67,332) $ (22,218) $ 30,282
Income (loss) per share- basic and diluted $ (0.61) $ (0.21) $ (1.15) $ 0.46 $ 0.28 $ 0.13 $ (0.75) $ (0.26) $ (1.55) $ (0.60) $ 1.88