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Note 4 - Segment Reporting (Details) - Net Sales by Segment (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 362,609 | $ 346,688 | $ 704,617 | $ 746,260
Residential Power Products [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | 179,592 | 196,616 | 343,561 | 451,860
Commercial and Industrial Power Products [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | 163,467 | 133,427 | 320,837 | 260,507
Other Products and Services [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Net sales | $ 19,550 | $ 16,645 | $ 40,219 | $ 33,893

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- 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 + Details
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