Estimated Fair Values of Assets Acquired and Liabilities Assumed for Danfotech Acquisition (Details) (Danfotech, USD $) In Thousands, unless otherwise specified	Jul. 05, 2011
Business Acquisition [Line Items]
Cash	$ 165
Current assets	703
Property, plant and equipment	47
Goodwill	5,966
Other intangibles	1,086
Other assets	4
Current liabilities	(1,116)
Long-term deferred tax liability	(190)
Other non-current liabilities	(750)
Consideration paid at closing	5,915
Additional assets acquired post closing	730
Contingent consideration	1,500
Net assets acquired and liabilities assumed	8,145
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)
Other non-current liabilities	0
Consideration paid at closing	6,276
Additional assets acquired post closing	0
Contingent consideration	1,500
Net assets acquired and liabilities assumed	7,776
Measurement Period Adjustments
Business Acquisition [Line Items]
Cash	0
Current assets	(370)
Property, plant and equipment	(55)
Goodwill	2,543
Other intangibles	(778)
Other assets	0
Current liabilities	(807)
Long-term deferred tax liability	(144)
Other non-current liabilities	(750)
Consideration paid at closing	(361)
Additional assets acquired post closing	730
Contingent consideration	0
Net assets acquired and liabilities assumed	$ 369