Summary of Results of Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	$ 6,818	$ 13,255
Income before income taxes	989	1,374
Income tax expense	362	499
Income from discontinued operations	627	875
Gain on sale of discontinued operations, net of tax of $2,229	3,857	3,857
Income from discontinued operations, net of tax	$ 4,484	$ 4,732