Discontinued Operations (Discontinued Operations' Operating Results) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales	$ 13,274	$ 10,584	$ 25,544	$ 21,315
Income from discontinued operations before income taxes	2,513	1,092	3,777	2,516
Provision for income taxes	880	382	1,321	880
Income from discontinued operations, net of income taxes	$ 1,633	$ 710	$ 2,456	$ 1,636