CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 459,019	$ 351,190	$ 1,229,345	$ 926,225
Cost of sales	295,903	226,893	798,444	604,489
Gross profit	163,116	124,297	430,901	321,736
Selling, general, and administrative expenses	106,446	75,472	288,534	223,409
Restructuring expense	76	441	381	2,189
Operating income	56,594	48,384	141,986	96,138
Interest expense	(1,384)	(1,130)	(3,840)	(3,496)
Other income/(expense), net	2,061	(463)	1,531	(1,062)
Foreign exchange income/(expense)	(408)	(140)	(1,654)	(84)
Income before income taxes	56,863	46,651	138,023	91,496
Income tax (benefit)/expense	10,409	8,076	24,043	17,327
Net income	46,454	38,575	113,980	74,169
Less: Net (income)/expense attributable to noncontrolling interests	(282)	(203)	(787)	(503)
Net income attributable to Franklin Electric Co., Inc.	$ 46,172	$ 38,372	$ 113,193	$ 73,666
Income per share:
Basic	$ 0.99	$ 0.82	$ 2.43	$ 1.58
Diluted	$ 0.98	$ 0.82	$ 2.40	$ 1.57