Discontinued Operations - Schedule of Condensed Income Statement (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Discontinued Operations And Disposal Groups [Abstract]
Net sales	$ 15,828	$ 46,382
Income from operations	2,710	5,807
Income before taxes	2,693	5,729
Income tax expense	969	2,456
Income from discontinued operations, net of tax	1,724	3,273
Noncontrolling interest in income from discontinued operations, net of tax	225	426
Total discontinued operations, net of tax and noncontrolling interest	$ 1,499	$ 2,847