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Note 7 - Segment Reporting - Net Sales by Products and Services (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Net sales | $ 601,135 | $ 562,388 | $ 1,613,404 | $ 1,460,060
Residential Power Products [Member] |  |  |  |
Net sales | 335,029 | 311,918 | 821,233 | 748,790
Commercial and Industrial Power Products [Member] |  |  |  |
Net sales | 214,905 | 206,366 | 654,458 | 597,119
Other Products and Services [Member] |  |  |  |
Net sales | 51,201 | 44,104 | 137,713 | 114,151
Domestic [Member] |  |  |  |
Net sales | 498,163 | 456,132 | 1,283,348 | 1,142,487
Domestic [Member] | Residential Power Products [Member] |  |  |  |
Net sales | 324,096 | 300,387 | 784,459 | 711,203
Domestic [Member] | Commercial and Industrial Power Products [Member] |  |  |  |
Net sales | 133,559 | 121,952 | 394,545 | 340,244
Domestic [Member] | Other Products and Services [Member] |  |  |  |
Net sales | 40,508 | 33,793 | 104,344 | 91,040
International [Member] |  |  |  |
Net sales | 102,972 | 106,256 | 330,056 | 317,573
International [Member] | Residential Power Products [Member] |  |  |  |
Net sales | 10,933 | 11,531 | 36,774 | 37,587
International [Member] | Commercial and Industrial Power Products [Member] |  |  |  |
Net sales | 81,346 | 84,414 | 259,913 | 256,875
International [Member] | Other Products and Services [Member] |  |  |  |
Net sales | $ 10,693 | $ 10,311 | $ 33,369 | $ 23,111

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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