UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income from consolidated operations	$ 95,650,450	$ 86,040,438	$ 190,524,495	$ 194,271,153
Other comprehensive income (loss) before tax:
Foreign currency translation adjustments	2,109,011	(509,541)	1,763,781	(1,459,754)
Unrealized losses on derivatives	(1,245,367)	0	(1,245,367)	0
Unrealized gains on debt securities, net	643,420	271	2,826,267	52,181
Other comprehensive income (loss), before tax	1,507,064	(509,270)	3,344,681	(1,407,573)
Income tax impact related to components of other comprehensive income (loss)	(126,409)	57	331,989	10,958
Other comprehensive income (loss), net of tax	1,633,473	(509,327)	3,012,692	(1,418,531)
Comprehensive income from consolidated operations	97,283,923	85,531,111	193,537,187	192,852,622
Net loss attributable to non-controlling interests	(389,134)	0	(389,134)	0
Comprehensive income attributable to Gentex Corporation	$ 97,673,057	$ 85,531,111	$ 193,926,321	$ 192,852,622