Note 7 - Segment Reporting - Total Sales by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Total sales	$ 1,291,391	$ 919,981	$ 2,427,247	$ 1,727,415
External Net Sales [Member]
Total sales	1,291,391	919,981	2,427,247	1,727,415
Intersegment Sales [Member]
Total sales	0	0	0	0
Intersegment Eliminations [Member]
Total sales	(38,321)	(15,347)	(62,916)	(24,031)
Intersegment Eliminations [Member] | External Net Sales [Member]
Total sales	0	0	0	0
Intersegment Eliminations [Member] | Intersegment Sales [Member]
Total sales	(38,321)	(15,347)	(62,916)	(24,031)
Domestic [Member]
Total sales	1,107,431	784,146	2,072,105	1,476,884
Domestic [Member] | Operating Segments [Member]
Total sales	1,126,418	792,944	2,101,362	1,492,363
Domestic [Member] | Operating Segments [Member] | External Net Sales [Member]
Total sales	1,107,431	784,146	2,072,105	1,476,884
Domestic [Member] | Operating Segments [Member] | Intersegment Sales [Member]
Total sales	18,987	8,798	29,257	15,479
International [Member]
Total sales	183,960	135,835	355,142	250,531
International [Member] | Operating Segments [Member]
Total sales	203,294	142,384	388,801	259,083
International [Member] | Operating Segments [Member] | External Net Sales [Member]
Total sales	183,960	135,835	355,142	250,531
International [Member] | Operating Segments [Member] | Intersegment Sales [Member]
Total sales	$ 19,334	$ 6,549	$ 33,659	$ 8,552