Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021		Jun. 30, 2022		Jun. 30, 2021
Net sales	$ 1,291,391	$ 919,981		$ 2,427,247		$ 1,727,415
Costs of goods sold	834,406	580,246		1,609,514		1,065,866
Gross profit	456,985	339,735		817,733		661,549
Operating expenses:
Selling and service	120,066	78,777		218,309		147,201
Research and development	41,599	25,344		81,343		47,732
General and administrative	52,600	41,610		94,572		74,509
Amortization of intangibles	25,876	11,052		51,930		20,031
Total operating expenses	240,141	156,783		446,154		289,473
Income from operations	216,844	182,952		371,579		372,076
Other (expense) income:
Interest expense	(10,235)	(7,721)		(19,789)		(15,444)
Investment income	92	244		169		847
Loss on extinguishment of debt	3,743	831	[1]	3,743	[1]	831	[1]
Other, net	505	(373)		751		2,936
Total other expense, net	(13,381)	(8,681)		(22,612)		(12,492)
Income before provision for income taxes	203,463	174,271		348,967		359,584
Provision for income taxes	45,826	46,362		74,434		81,730
Net income	157,637	127,909		274,533		277,854
Net income attributable to noncontrolling interests	1,278	873		4,316		1,825
Net income attributable to Generac Holdings Inc.	$ 156,359	$ 127,036		$ 270,217		$ 276,029
Net income attributable to Generac Holdings Inc. per common share - basic: (in dollars per share)	$ 2.24	$ 2.06		$ 3.85		$ 4.44
Weighted average common shares outstanding - basic: (in shares)	63,662,510	62,605,166		63,607,711		62,533,725
Net income attributable to Generac Holdings Inc. per common share - diluted: (in dollars per share)	$ 2.21	$ 2.01		$ 3.78		$ 4.34
Weighted average common shares outstanding - diluted: (in shares)	64,713,748	64,088,709		64,799,002		64,097,378
Comprehensive income attributable to Generac Holdings Inc.	$ 120,864	$ 119,246		$ 243,229		$ 273,062

[1] Represents the non-cash write-off of original issue discount and deferred financing costs due primarily to a voluntary prepayment of Term Loan debt.