Discontinued Operations (Discontinued Operations' Operating Results) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales	$ 0	$ 12,368	$ 25,544	$ 33,684
Income from discontinued operations before income taxes	0	1,826	3,777	4,343
Provision for income taxes	0	(639)	(1,321)	(1,520)
Income from discontinued operations, net of income taxes	$ 0	$ 1,187	$ 2,456	$ 2,823