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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, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
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, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of Quarterly Financial Information [Line Items]                              
Net sales $ 458,354 $ 439,977 $ 413,126 $ 324,229 $ 415,847 $ 405,917 $ 362,408 $ 277,682 $ 341,732 $ 336,433 $ 287,095 $ 221,984 $ 1,635,686 $ 1,461,854 $ 1,187,244
Gross profit 52,587 61,497 58,853 42,186 54,339 50,074 39,681 19,729 20,659 13,320 16,240 16,501 215,123 163,823 66,720
Net income $ 10,423 [1] $ 16,236 [1] $ 14,135 [1] $ 5,735 [1] $ 80,184 [1],[2] $ 18,441 [1],[2] $ 1,942 [1],[2] $ 5,064 [1],[2] $ 7,451 $ 1,092 $ 3,302 $ 3,197 $ 46,529 $ 105,631 $ 15,042
Basic net income per share $ 0.15 $ 0.24 $ 0.20 $ 0.08                 $ 0.67 $ 1.53 $ 0.22
Diluted net income per share $ 0.15 [3] $ 0.23 [3] $ 0.20 [3] $ 0.08 [3]                 $ 0.67 $ 1.53 $ 0.22
Basic and diluted net income per share         $ 1.16 [3] $ 0.27 [3] $ 0.03 [3] $ 0.07 [3] $ 0.11 [3] $ 0.02 [3] $ 0.05 [3] $ 0.05 [3] $ 0.67 $ 1.53 $ 0.22
[1] Net income includes pre-tax 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, and $0.6 million, $0.2 million and less than $0.1 million for the first, second and third quarters of 2013, 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] Basic and diluted net income per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly net income per share may differ from annual net income per share due to rounding.