Acquisitions Pro Forma (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Business Acquisition [Line Items]
Net sales	$ 194,365	$ 406,949
Cost of sales	143,257	293,734
Gross profit	51,108	113,215
Selling, general & administrative expenses	39,912	83,231
Operating income	11,196	29,984
Interest expense, net	2,866	5,081
Income before taxes	8,330	24,903
Income taxes	3,049	9,304
Net income	$ 5,281	$ 15,599
Income per basic share	$ 0.16	$ 0.47
Income per diluted share	$ 0.15	$ 0.46