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Quarterly Unaudited Financial Data (Details) - USD ($) $ / shares in Units, $ 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 Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 282,093 | $ 304,994 | $ 253,171 | $ 200,615 | $ 201,994 | $ 234,101 | $ 234,960 | $ 191,032 | $ 1,040,873 | $ 862,087 | $ 827,567
Gross profit | 51,546 | 61,396 | 44,119 | 29,915 | 28,480 | 41,578 | 40,123 | 29,864 | 186,976 | 140,045 | 158,097
Income (loss) from operations: | 4,520 | 23,394 | 11,201 | 8,970 | (103,872) | 18,392 | 14,730 | 333 | 48,085 | (70,417) | 21,480
Interest expense | 3,614 | 3,878 | 3,811 | 3,700 | 3,433 | 3,657 | 3,691 | 3,640 | 15,003 | 14,421 | 22,489
Income (loss) from continuing operations | 220 | 13,632 | 4,087 | 5,537 | (95,708) | 9,571 | 6,431 | (2,086) | 23,476 | (81,792) | (5,629)
Loss from discontinued operations | 0 | 0 | 0 | (28) | (1) | (31) | 0 | 0 | (28) | (32) | (4)
Net income (loss) | $ 220 | $ 13,632 | $ 4,087 | $ 5,509 | $ (95,709) | $ 9,540 | $ 6,431 | $ (2,086) | $ 23,448 | $ (81,824) | $ (5,633)
(Loss) income per share from continuing operations: |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 0.01 | $ 0.44 | $ 0.13 | $ 0.18 | $ (3.08) | $ 0.31 | $ 0.21 | $ (0.07) | $ 0.75 | $ (2.63) | $ (0.18)
Diluted (in dollars per share) | 0.01 | 0.43 | 0.13 | 0.18 | (3.08) | 0.31 | 0.21 | (0.07) | 0.74 | (2.63) | (0.18)
Loss per share from discontinued operations: |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | (0.01) | 0.00 | 0.00 | 0.00 | 0.00 | 0.00
Diluted (in dollars per share) | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ (0.01) | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.00

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