Estimated Fair Values of Assets Acquired and Liabilities Assumed for the Danfotech Acquisition (Detail) (Danfotech, USD $) In Thousands, unless otherwise specified	Jul. 05, 2011
Business Acquisition [Line Items]
Cash	$ 165
Current assets	707
Property, plant and equipment	47
Goodwill	6,269
Other intangibles	1,086
Other assets	4
Current liabilities	(1,062)
Long-term deferred tax liability	(190)
Other non-current liabilities	(750)
Consideration paid at closing	6,276
Additional assets acquired post closing	730
Contingent consideration	1,500
Net assets acquired and liabilities assumed	8,506
as initially reported
Business Acquisition [Line Items]
Cash	165
Current assets	1,073
Property, plant and equipment	102
Goodwill	3,423
Other intangibles	1,864
Other assets	4
Current liabilities	(309)
Long-term deferred tax liability	(46)
Consideration paid at closing	6,276
Contingent consideration	1,500
Net assets acquired and liabilities assumed	7,776
Measurement Period Adjustments
Business Acquisition [Line Items]
Current assets	(366)
Property, plant and equipment	(55)
Goodwill	2,846
Other intangibles	(778)
Current liabilities	(753)
Long-term deferred tax liability	(144)
Other non-current liabilities	(750)
Additional assets acquired post closing	730
Net assets acquired and liabilities assumed	$ 730