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Summary of the Unaudited Quarterly Results of Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Net sales $ 415,847 $ 405,917 $ 362,408 $ 277,682 $ 341,732 $ 336,433 $ 287,095 $ 221,984 $ 241,551 $ 170,848 $ 149,699 $ 78,274 $ 1,461,854 $ 1,187,244 $ 640,372
Gross profit 54,339 50,074 39,681 19,729 20,659 13,320 16,240 16,501 17,291 6,467 5,301 (976) 163,823 66,720 28,083
Net income $ 80,184 [1],[2] $ 18,441 [1],[2] $ 1,942 [1],[2] $ 5,064 [1],[2] $ 7,451 $ 1,092 $ 3,302 $ 3,197 $ 4,859 [3] $ (1,938) [3] $ (5,602) [3] $ (139,079) [3] $ 105,631 $ 15,042 $ (141,760)
Basic and diluted net income per share $ 1.16 [4] $ 0.27 [4] $ 0.03 [4] $ 0.07 [4] $ 0.11 [4] $ 0.02 [4] $ 0.05 [4] $ 0.05 [4] $ 0.07 [4],[5] $ (0.03) [4],[5] $ (0.72) [4],[5] $ (4.64) [4],[5] $ 0.22 $ (3.36) $ (3.48)
[1] Net income includes charges of $1.7 million, $13.6 million, $2.4 million and $0.5 million for the first, second, third and fourth quarters of 2012, respectively, in connection with acquisition related charges associated with the Company's acquisition of Walker as well as the purchase of certain assets of Beall.
[2] Net income for the fourth quarter of 2012 includes an income tax benefit of $59.0 million primarily related to the reversal of a U.S. valuation allowance against its deferred tax assets.
[3] Net (loss) income includes a non-cash (charge) benefit of ($126.8) million, $1.9 million and $3.3 million related to the change in the fair value of the Company's warrant for the first, second and third quarters of 2010, respectively.
[4] Basic and diluted net income (loss) per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly net income (loss) per share may differ from annual net income (loss) per share due to rounding.
[5] Basic and diluted net (loss) income per share includes $2.0 million and $1.3 million of preferred stock dividends for the first and second quarters of 2010, respectively. The second quarter of 2010 also includes a $22.1 million loss on early extinguishment of preferred stock