CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 46,454	$ 38,575	$ 113,980	$ 74,169
Other comprehensive income/(loss), before tax:
Foreign currency translation adjustments	(12,085)	3,364	(15,464)	(32,381)
Employee benefit plan activity	1,158	966	3,391	2,768
Other comprehensive income/(loss)	(10,927)	4,330	(12,073)	(29,613)
Income tax expense related to items of other comprehensive income/(loss)	(243)	(192)	(707)	(562)
Other comprehensive income/(loss), net of tax	(11,170)	4,138	(12,780)	(30,175)
Comprehensive income	35,284	42,713	101,200	43,994
Less: Comprehensive income/(loss) attributable to noncontrolling interests	231	237	692	564
Comprehensive income attributable to Franklin Electric Co., Inc.	$ 35,053	$ 42,476	$ 100,508	$ 43,430