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Note 7 - Segment Reporting - Net Sales by Products and Services (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net sales	$ 807,434	$ 475,915
Domestic [Member]
Net sales	692,738	376,030
International [Member]
Net sales	114,696	99,885
Residential Power Products [Member]
Net sales	542,149	257,619
Residential Power Products [Member] | Domestic [Member]
Net sales	522,215	243,830
Residential Power Products [Member] | International [Member]
Net sales	19,934	13,789
Commercial and Industrial Power Products [Member]
Net sales	202,391	172,066
Commercial and Industrial Power Products [Member] | Domestic [Member]
Net sales	117,879	95,827
Commercial and Industrial Power Products [Member] | International [Member]
Net sales	84,512	76,239
Other Products and Services [Member]
Net sales	62,894	46,230
Other Products and Services [Member] | Domestic [Member]
Net sales	52,644	36,373
Other Products and Services [Member] | International [Member]
Net sales	$ 10,250	$ 9,857

X

- 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.

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