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Discontinued Operations - Schedule of Condensed Income Statement (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Discontinued Operations And Disposal Groups [Abstract]    
Net sales $ 15,452 $ 30,554
Operating income 1,771 3,097
Other income, net 5 9
Interest expense (29) (70)
Income before income taxes 1,747 3,036
Income tax expense (858) (1,487)
Net income $ 889 $ 1,549