Estimated Fair Values of Assets Acquired and Liabilities Assumed for the Drake Acquisition (Detail) (Drake, USD $) In Thousands, unless otherwise specified	Dec. 02, 2011
Drake
Business Acquisition [Line Items]
Cash	$ 427
Current assets	4,245
Deferred tax asset	390
Property, plant and equipment	1,773
Goodwill	15,237
Other intangibles	5,810
Other assets	9
Current liabilities	(3,334)
Long-term deferred tax liability	(2,395)
Net assets acquired and liabilities assumed	$ 22,162