Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net sales	$ 395,376	$ 367,376	$ 727,190	$ 653,911
Costs of goods sold	260,916	243,229	482,244	431,704
Gross profit	134,460	124,147	244,946	222,207
Operating expenses:
Selling and service	43,116	42,366	83,300	79,635
Research and development	10,567	9,889	20,868	18,086
General and administrative	21,361	19,593	42,334	37,426
Amortization of intangibles	7,129	8,217	14,312	16,014
Total operating expenses	82,173	80,065	160,814	151,161
Income from operations	52,287	44,082	84,132	71,046
Other (expense) income:
Interest expense	(10,893)	(11,380)	(21,681)	(22,415)
Investment income	38	4	43	36
Costs related to acquisition	(136)		(321)	(417)
Other, net	(1,437)	158	(1,214)	545
Total other expense, net	(12,428)	(11,218)	(23,173)	(22,251)
Income before provision for income taxes	39,859	32,864	60,959	48,795
Provision for income taxes	14,114	11,921	22,365	17,640
Net income	25,745	20,943	38,594	31,155
Net income attributable to noncontrolling interests	85	55	92	59
Net income attributable to Generac Holdings Inc.	$ 25,660	$ 20,888	$ 38,502	$ 31,096
Net income attributable to common shareholders per common share - basic: (in dollars per share)	$ 0.42	$ 0.32	$ 0.63	$ 0.47
Weighted average common shares outstanding - basic: (in shares)	62,146,393	65,870,714	62,260,170	65,955,455
Net income attributable to common shareholders per common share - diluted: (in dollars per share)	$ 0.41	$ 0.31	$ 0.63	$ 0.47
Weighted average common shares outstanding - diluted: (in shares)	62,635,437	66,388,581	62,849,877	66,465,770
Comprehensive income attributable to Generac Holdings Inc.	$ 32,577	$ 7,622	$ 48,964	$ 19,076