Estimated Fair Values of Assets Acquired and Liabilities Assumed for Baker Acquisition (Details) (USD $) In Thousands, unless otherwise specified	Sep. 05, 2012 as initially reported	Mar. 14, 2012 Baker	Mar. 14, 2012 Baker as initially reported	Mar. 14, 2012 Baker Measurement Period Adjustments
Business Acquisition [Line Items]
Current assets		$ 3,881	$ 4,617	$ (736)
Property, plant and equipment		221	221	0
Goodwill		5,783	5,797	(14)
Other intangibles		750	0	750
Current liabilities		(385)	(385)	0
Net assets acquired and liabilities assumed	$ 32,000	$ 10,250	$ 10,250	$ 0