Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net sales	$ 470,353	$ 400,091
Costs of goods sold	308,178	258,164
Gross profit	162,175	141,927
Operating expenses:
Selling and service	47,289	44,620
Research and development	13,609	11,853
General and administrative	24,762	23,475
Amortization of intangibles	5,342	5,632
Total operating expenses	91,002	85,580
Income from operations	71,173	56,347
Other (expense) income:
Interest expense	(10,272)	(10,113)
Investment income	914	346
Other, net	(1,061)	(1,394)
Total other expense, net	(10,419)	(11,161)
Income before provision for income taxes	60,754	45,186
Provision for income taxes	14,985	11,416
Net income	45,769	33,770
Net income attributable to noncontrolling interests	908	125
Net income attributable to Generac Holdings Inc.	$ 44,861	$ 33,645
Net income attributable to Generac Holdings Inc. per common share - basic: (in dollars per share)	$ 0.77	$ 0.42
Weighted average common shares outstanding - basic: (in shares)	61,762,260	61,943,495
Net income attributable to Generac Holdings Inc. per common share - diluted: (in dollars per share)	$ 0.76	$ 0.42
Weighted average common shares outstanding - diluted: (in shares)	62,223,638	62,474,936
Comprehensive income attributable to Generac Holdings Inc.	$ 39,527	$ 44,703