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Quarterly Financial Data (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ 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
Quarterly Financial Information [Line Items]                      
Net Sales $ 163,407 $ 337,027 $ 131,106 $ 114,201 $ 254,016 $ 349,362 $ 124,172 $ 82,510 $ 745,741 $ 810,060 $ 632,925
Gross profit 49,575 104,329 39,287 35,378 79,697 94,737 37,818 23,555 228,569 235,807 155,779
Income (loss) from operations (6,891) 44,628 (3,008) (4,199) 7,258 43,812 (4,819) (14,924) 30,530 31,327 (44,532)
Income (loss) before provision (benefit) for income taxes (9,078) 47,239 (4,414) (7,154) 3,978 45,807 (7,772) (16,789) 26,593 25,224 (51,295)
Net income (loss) $ (9,386) $ 45,864 $ (5,727) $ (7,581) $ 2,798 $ 44,069 $ (9,053) $ (16,305) $ 23,254 $ 21,509 $ (53,906)
Basic earnings (loss) per share $ (0.50) $ 2.47 $ (0.30) $ (0.40) $ 0.14 $ 2.33 $ (0.43) $ (0.74) $ 1.20 $ 1.03 $ (2.43)
Weighted average shares outstanding 18,781 18,559 19,108 19,090 19,570 18,897 21,276 22,003 19,435 20,948 22,200
Diluted earnings (loss) per share $ (0.50) $ 1.12 $ (0.30) $ (0.40) $ 0.11 $ 1.03 $ (0.43) $ (0.74) $ 0.71 $ 0.70 $ (2.43)
Weighted average shares and equivalents outstanding 18,781 42,562 19,108 19,090 44,060 45,152 21,276 22,003 43,321 41,516 22,200