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v3.23.3

Stock-Based Compensation Plans - Narrative (Details) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2022 shares | May 31, 2022 shares | Sep. 30, 2023 USD ($) plan shares | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) plan shares | Sep. 30, 2022 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Compensation expense for share-based payments | $ |  |  | $ 10,948,031 | $ 7,611,546 | $ 29,212,236 | $ 22,973,113
Employee Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares issued under the omnibus plan (in shares) |  |  |  |  | 1,624,122 |
Number of shares authorized (in shares) | 2,000,000 |  |  |  |  |
ESPP discount rate | 85.00% |  |  |  |  |
ESPP discount rate recognized as compensation expense | 15.00% |  |  |  |  |
Equity Incentive Plans |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of plans | plan |  |  | 2 |  | 2 |
Performance Shares |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Compensation expense for share-based payments | $ |  |  | $ 2,463,158 | 308,812 | $ 4,600,386 | 1,431,018
Unrecognized compensation cost | $ |  |  | 18,288,329 |  | 18,288,329 |
Performance Share Awards |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Compensation expense for share-based payments | $ |  |  | $ 441,115 |  | $ 1,082,333 |
Option vesting period |  |  |  |  | 4 years |
Omnibus Incentive Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total grants in period (in shares) |  |  |  |  | 9,733,895 |
Shares issued under the omnibus plan (in shares) |  |  |  |  | 24,797,549 |
Number of shares authorized (in shares) |  |  | 45,000,000 |  | 45,000,000 |
Omnibus Incentive Plan | Performance Shares |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares issued under the omnibus plan (in shares) |  |  |  |  | 3,515,440 |
Employee Stock Option Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized compensation cost | $ |  |  | $ 8,461,373 |  | $ 8,461,373 |
Employee Stock Option Plan | Minimum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Option vesting period |  |  |  |  | 1 year |
Option expiration period |  |  |  |  | 5 years |
Employee Stock Option Plan | Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Option vesting period |  |  |  |  | 5 years |
Option expiration period |  |  |  |  | 10 years |
Restricted Stock Plan |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Unrecognized compensation cost | $ |  |  | 46,555,320 |  | $ 46,555,320 |
Restricted period, maximum |  |  |  |  | 10 years |
Amortization expense | $ |  |  | $ 6,369,348 | $ 5,504,462 | $ 18,178,157 | $ 16,130,339
Gentex Corporation Employee Stock Purchase Plan | Employee Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares issued under the omnibus plan (in shares) |  |  |  |  | 250,369 |
Number of shares authorized (in shares) |  | 2,000,000 |  |  |  |
ESPP discount rate |  | 85.00% |  |  |  |
ESPP discount rate recognized as compensation expense |  | 15.00% |  |  |  |

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