Quarterly report pursuant to Section 13 or 15(d)

Business Acquisition Business Acquisition (Schedule of Pro Forma Information) (Details)

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Business Acquisition Business Acquisition (Schedule of Pro Forma Information) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Business Combinations [Abstract]        
Pro forma net sales $ 675,296 $ 546,676 $ 1,467,059 $ 1,218,100
Pro forma net income $ 67,492 $ 56,175 $ 89,146 $ 58,765
Earnings per share        
Pro forma earnings per share, basic $ 0.96 $ 0.82 $ 1.28 $ 0.86
Pro forma earnings per share, diluted $ 0.95 $ 0.81 $ 1.26 $ 0.85