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Note 7 - Segment Reporting - Net Sales by Products and Services (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Net sales | $ 541,916 | $ 497,581 | $ 1,012,269 | $ 897,672
Residential Power Products [Member] |  |  |  |
Net sales | 268,374 | 246,398 | 486,204 | 436,872
Commercial and Industrial Power Products [Member] |  |  |  |
Net sales | 230,428 | 215,628 | 439,552 | 390,753
Other Products and Services [Member] |  |  |  |
Net sales | 43,114 | 35,555 | 86,513 | 70,047
Domestic [Member] |  |  |  |
Net sales | 425,938 | 383,679 | 785,186 | 686,355
Domestic [Member] | Residential Power Products [Member] |  |  |  |
Net sales | 255,182 | 234,131 | 460,363 | 410,816
Domestic [Member] | Commercial and Industrial Power Products [Member] |  |  |  |
Net sales | 138,540 | 120,521 | 260,986 | 218,292
Domestic [Member] | Other Products and Services [Member] |  |  |  |
Net sales | 32,216 | 29,027 | 63,837 | 57,247
International [Member] |  |  |  |
Net sales | 115,978 | 113,902 | 227,083 | 211,317
International [Member] | Residential Power Products [Member] |  |  |  |
Net sales | 13,192 | 12,267 | 25,841 | 26,056
International [Member] | Commercial and Industrial Power Products [Member] |  |  |  |
Net sales | 91,889 | 95,107 | 178,566 | 172,461
International [Member] | Other Products and Services [Member] |  |  |  |
Net sales | $ 10,897 | $ 6,528 | $ 22,675 | $ 12,800

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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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