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Note 5 - Segment Reporting (Details) - Net Sales by Segment (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue from External Customer [Line Items]
Net sales	$ 352,305	$ 363,269	$ 1,056,922	$ 1,109,529
Residential Power Products [Member]
Revenue from External Customer [Line Items]
Net sales	183,747	192,728	527,308	644,588
Commercial and Industrial Power Products [Member]
Revenue from External Customer [Line Items]
Net sales	146,411	151,488	467,248	411,995
Other Products and Services [Member]
Revenue from External Customer [Line Items]
Net sales	$ 22,147	$ 19,053	$ 62,366	$ 52,946

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X

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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