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Acquisitions Pro Forma (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Business Acquisition [Line Items]  
Net sales $ 608,239
Cost of sales 440,999
Gross profit 167,240
Selling, general & administrative expenses 127,007
Operating income 40,233
Interest expense, net 6,287
Income before taxes 33,946
Income taxes 12,261
Net income $ 21,685
Income per basic share $ 0.65
Income per diluted share $ 0.63