Estimated Fair Values of Assets Acquired and Liabilities Assumed for Maurer Acquisition (Details) (USD $) In Thousands, unless otherwise specified	Sep. 05, 2012 as initially reported	Jul. 22, 2011 Maurer	Jul. 22, 2011 Maurer as initially reported	Jul. 22, 2011 Maurer Measurement Period Adjustments
Business Acquisition [Line Items]
Current assets		$ 1,005	$ 1,673	$ (668)
Property, plant and equipment		628	628	0
Goodwill		1,220	870	350
Other intangibles		922	922	0
Current liabilities		(510)	(246)	(264)
Net assets acquired and liabilities assumed	$ 32,000	$ 3,265	$ 3,847	$ (582)