Acquisitions (Pro Forma) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Business Combinations [Abstract]
Net sales	$ 115,210	$ 95,907	$ 329,033	$ 292,057
Net sales, Pro Forma		106,600		320,843
Net income	5,607	7,226	10,030	19,069
Net Income, Pro Forma		$ 8,707		$ 22,007
Basic (in dollars per share)	$ 0.13	$ 0.17	$ 0.24	$ 0.45
Basic, Pro Forma (in dollars per share)		$ 0.21		$ 0.52
Diluted (in dollars per share)	$ 0.13	$ 0.17	$ 0.23	$ 0.45
Diluted, Pro Forma (in dollars per share)		$ 0.20		$ 0.52