Estimated Fair Values of Assets Acquired and Liabilities Assumed for the Maurer Acquisition (Detail) (Maurer, USD $) In Thousands, unless otherwise specified	Jul. 22, 2011
Business Acquisition [Line Items]
Current assets	$ 1,005
Property, plant and equipment	628
Goodwill	992
Other intangibles	922
Current liabilities	(282)
Net assets acquired and liabilities assumed	3,265
as initially reported
Business Acquisition [Line Items]
Current assets	1,673
Property, plant and equipment	628
Goodwill	870
Other intangibles	922
Current liabilities	(246)
Net assets acquired and liabilities assumed	3,847
Measurement Period Adjustments
Business Acquisition [Line Items]
Current assets	(668)
Goodwill	122
Current liabilities	(36)
Net assets acquired and liabilities assumed	$ (582)