Discontinued Operations - Statement of Earnings of Discontinued Operation (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Discontinued Operations And Disposal Groups [Abstract]
Net sales	$ 51,450
Cost of goods sold	47,056
Selling, general and administrative expenses	3,731
Restructuring and impairment charge	382
Operating earnings	281
Interest expense, net	(8)
Other income, net	804
Earnings before income taxes	1,077
Income tax expense	496
Net Earnings from Discontinued Operations	$ 581