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Stock-Based Compensation Plans | 12 Months Ended
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Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Compensation Plans | STOCK-BASED COMPENSATION PLANS At December 31, 2016, the Company had four equity incentive plans which include two stock option plans, a restricted stock plan and an employee stock purchase plan. All of the plans and any material amendments thereto have previously been approved by shareholders. Employee Stock Option Plan In May 2014, the Employee Stock Option Plan was approved by shareholders, amending and restating a prior plan. The Company may grant up to 24,000,000 shares of common stock under the plan. The purpose of the plan is to provide an opportunity to use stock options as a means of recruiting new managerial and technical personnel and as a means for retaining certain employees of the Company by allowing them to purchase shares of common stock of the Corporation and thereby have an additional incentive to contribute to the prosperity of the Company. The Company has granted options on 10,342,260 shares (net of shares from canceled/expired options) under the plan through December 31, 2016. Under the plan, the option exercise price equals the stock’s market price on date of grant. The options vest after one to five years, and expire after five to seven years. The fair value of each option grant in the Employee Stock Option Plan was estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions for the indicated periods:
| 2016 |  | 2015 |  | 2014
Dividend yield (1) | 2.2 | % |  | 2.1 | % |  | 2.3 | %
Expected volatility (2) | 33.2 | % |  | 35.8 | % |  | 38.5 | %
Risk-free interest rate (3) | 1.4 | % |  | 1.5 | % |  | 1.7 | %
Expected term of options (in years) (4) | 4.7 |  |  | 4.3 |  |  | 4.2 |
Weighted-average grant-date fair value | $ | 4 |  |  | $ | 4 |  |  | $ | 4 |
(1) Represents the Company's estimated cash dividend yield over the expected term of option grant.
(2) | Amount is determined based on analysis of historical price volatility of the Company's common stock. The expected volatility is based on the daily percentage change in the price of the stock over a period equal to the expected term of the option grant.
(3) Represents the U.S. Treasury yield over the expected term of the option grant.
(4) | Represents the period of time that options granted are expected to be outstanding. Based on analysis of historical option exercise activity, the Company has determined that all employee groups exhibit similar exercise and post-vesting termination behavior.
As of December 31, 2016, there was $17,732,000 of unrecognized compensation cost related to share-based payments which is expected to be recognized over the remaining vesting periods, with a weighted-average period of 2.0 years. A summary of the status of the Company’s employee stock option plan at December 31, 2016, 2015 and 2014, and changes during the same periods are presented in the tables and narrative below and have been adjusted to reflect the two-for-one common stock split effected in the form of a 100% stock dividend on December 31, 2014.
| 2016
| Shares (000) |  | Wtd. Avg. Ex. Price |  | Wtd. Avg. Remaining Contract Life |  | Aggregate Intrinsic Value (000)
Outstanding at Beginning of Year | 17,692 |  |  | $ | 14 |  |  |  |  |
Granted | 3,227 |  |  | 17 |  |  |  |  |
Exercised | (6,291 | ) |  | 12 |  |  |  |  | $ | 31,790 |
Forfeited | (376 | ) |  | 15 |  |  |  |  |
Outstanding at End of Year | 14,252 |  |  | 15 |  |  | 3 Yrs |  | $ | 67,763 |
Exercisable at End of Year | 4,855 |  |  | $ | 14 |  |  | 2.3 Yrs |  | $ | 30,021 |
| 2015
| Shares (000) |  | Wtd. Avg. Ex. Price |  | Wtd. Avg. Remaining Contract Life |  | Aggregate Intrinsic Value (000)
Outstanding at Beginning of Year | 17,829 |  |  | $ | 13 |  |  |  |  |
Granted | 2,966 |  |  | 17 |  |  |  |  |
Exercised | (2,344 | ) |  | 12 |  |  |  |  | $ | 11,596 |
Forfeited | (759 | ) |  | 14 |  |  |  |  |
Outstanding at End of Year | 17,692 |  |  | 14 |  |  | 3 Yrs |  | $ | 45,842 |
Exercisable at End of Year | 6,858 |  |  | $ | 13 |  |  | 2.1 Yrs |  | $ | 23,917 |
| 2014
| Shares (000) |  | Wtd. Avg. Ex. Price |  | Wtd. Avg. Remaining Contract Life |  | Aggregate Intrinsic Value (000)
Outstanding at Beginning of Year | 18,000 |  |  | $ | 12 |  |  |  |  |
Granted | 5,757 |  |  | 15 |  |  |  |  |
Exercised | (5,224 | ) |  | 11 |  |  |  |  | $ | 26,618 |
Forfeited | (704 | ) |  | 13 |  |  |  |  |
Outstanding at End of Year | 17,829 |  |  | 13 |  |  | 3.5 Yrs |  | $ | 90,759 |
Exercisable at End of Year | 4,564 |  |  | $ | 12 |  |  | 2.3 Yrs |  | $ | 28,342 |
A summary of the status of the Company’s non-vested employee stock option activity for the years ended December 31, 2016, 2015, and 2014, are presented in the table and narrative below:
| 2016 |  | 2015 |  | 2014
| Shares (000) |  | Wtd. Avg Grant Date Fair Value |  | Shares (000) |  | Wtd. Avg Grant Date Fair Value |  | Shares (000) |  | Wtd. Avg Grant Date Fair Value
Nonvested Stock Options at Beginning of Year | 10,835 |  |  | $ | 4 |  |  | 13,265 |  |  | $ | 4 |  |  | 12,508 |  |  | $ | 4 |
Granted | 3,227 |  |  | 4 |  |  | 2,966 |  |  | 4 |  |  | 5,757 |  |  | 4 |
Vested | (4,343 | ) |  | 4 |  |  | (4,678 | ) |  | 4 |  |  | (4,346 | ) |  | 3 |
Forfeited | (322 | ) |  | 4 |  |  | (718 | ) |  | 4 |  |  | (654 | ) |  | 4 |
Nonvested Stock Options at End of Year | 9,397 |  |  | $ | 4 |  |  | 10,835 |  |  | $ | 4 |  |  | 13,265 |  |  | $ | 4 |
Non-employee Director Stock Option Plan In 2012, an Amended and Restated Non-employee Director Stock Option Plan, covering a total of 1,000,000 shares of common stock, was approved by shareholders replacing a prior plan. The Company has granted options on 371,000 shares (net of shares from canceled options) under the new director plan and 1,074,480 shares (net of shares from canceled options) under a prior plan through December 31, 2016. Under the shareholder approved plans, the option exercise price equals the stock's market price on date of grant. The options vest after six months, and expire after ten years. The fair value of each option grant in the Non-employee Director Stock Option Plans was estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions for the indicated periods:
| 2016 |  | 2015 |  | 2014
Dividend yield (1) | 2.2 | % |  | 2.1 | % |  | 2.2 | %
Expected volatility (2) | 34.1 | % |  | 36.3 | % |  | 39.6 | %
Risk-free interest rate (3) | 1.9 | % |  | 2.2 | % |  | 2.5 | %
Expected term of options (in years) (4) | 6.2 |  |  | 6.0 |  |  | 6.4 |
Weighted-average grant-date fair value | $ | 4 |  |  | $ | 5 |  |  | $ | 5 |
(1) Represents the Company's estimated cash dividend yield over the expected term of option grant.
(2) | Amount is determined based on analysis of historical price volatility of the Company's common stock. The expected volatility is based on the daily percentage change in the price of the stock over a period equal to the expected term of the option grant.
(3) Represents the U.S. Treasury yield over the expected term of the option grant.
(4) | Represents the period of time that options granted are expected to be outstanding. Based on analysis of historical option exercise activity, the Company has determined that non-employee directors exhibit similar exercise and post-vesting termination behavior.
As of December 31, 2016, there were no unrecognized compensation costs related to share-based payments under this plan. A summary of the status of the Company’s Non-employee Director Stock Option Plan at December 31, 2016, 2015, and 2014, and changes during the same periods are presented in the tables and narrative below:
| 2016
| Shares (000) |  | Wtd. Avg. Ex. Price |  | Wtd. Avg. Remaining Contract Life |  | Aggregate Intrinsic Value (000)
Outstanding at Beginning of Year | 373 |  |  | $ | 13 |  |  |  |  |
Granted | 56 |  |  | 16 |  |  |  |  |
Exercised | (36 | ) |  | 10 |  |  |  |  |  |
Forfeited | (12 | ) |  | 16 |  |  |  |  |
Outstanding at End of Year | 381 |  |  | 14 |  |  | 6.4 Yrs |  | $ | 2,180 |
Exercisable at End of Year | 381 |  |  | $ | 14 |  |  | 6.4 Yrs |  | $ | 2,180 |
| 2015
| Shares (000) |  | Wtd. Avg. Ex. Price |  | Wtd. Avg. Remaining Contract Life |  | Aggregate Intrinsic Value (000)
Outstanding at Beginning of Year | 381 |  |  | $ | 12 |  |  |  |  |
Granted | 49 |  |  | 17 |  |  |  |  |
Exercised | (57 | ) |  | 11 |  |  |  |  |  |
Forfeited | — |  |  | — |  |  |  |  |
Outstanding at End of Year | 373 |  |  | 13 |  |  | 6.4 Yrs |  | $ | 1,069 |
Exercisable at End of Year | 373 |  |  | $ | 13 |  |  | 6.4 Yrs |  | $ | 1,069 |
| 2014
| Shares (000) |  | Wtd. Avg. Ex. Price |  | Wtd. Avg. Remaining Contract Life |  | Aggregate Intrinsic Value (000)
Outstanding at Beginning of Year | 462 |  |  | $ | 11 |  |  |  |  |
Granted | 98 |  |  | 14 |  |  |  |  |
Exercised | (167 | ) |  | 10 |  |  |  |  | $ | 893 |
Forfeited | (12 | ) |  | 16 |  |  |  |  |
Outstanding at End of Year | 381 |  |  | 12 |  |  | 6.7 Yrs |  | $ | 2,137 |
Exercisable at End of Year | 381 |  |  | $ | 12 |  |  | 6.7 Yrs |  | $ | 2,137 |
A summary of the status of the Company’s nonvested Non-employee Director Stock Option Plan activity for the years ended December 31, 2016, 2015, and 2014, are presented in the table and narrative below:
| 2016 |  | 2015 |  | 2014
| Shares (000) |  | Wtd. Avg Grant Date Fair Value |  | Shares (000) |  | Wtd. Avg Grant Date Fair Value |  | Shares (000) |  | Wtd. Avg Grant Date Fair Value
Nonvested Stock Options at Beginning of Year | — |  |  | $ | — |  |  | — |  |  | $ | — |  |  | — |  |  | $ | — |
Granted | 56 |  |  | 4 |  |  | 49 |  |  | 5 |  |  | 98 |  |  | 5 |
Vested | (56 | ) |  | 4 |  |  | (49 | ) |  | 5 |  |  | (98 | ) |  | 5 |
Forfeited | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Nonvested stock options at End of Year | — |  |  | $ | — |  |  | — |  |  | $ | — |  |  | — |  |  | $ | — |
Employee Stock Purchase Plan In 2013, the Gentex Corporation Employee Stock Purchase Plan covering 2,000,000 shares of common stock was approved by the shareholders, replacing a prior plan. Under such plan, the Company sells shares at 85% of the stock’s market price at date of purchase. Under ASC 718, the 15% discounted value is recognized as compensation expense. The following table summarizes shares sold to employees under the 2013 Plan in the years ended December 31, 2016, 2015 and 2014.
Plan | 2016 |  | 2015 |  | 2014 | Cumulative Shares Issued in 2016 | Weighted Average Fair Value 2016
2013 Employee Stock Purchase Plan | 177,781 |  |  | 201,785 |  |  | 137,028 |  | 619,518 |  | $ | 14.24 |
Restricted Stock Plan In 2015, an amendment to the Company’s Second Restricted Stock Plan was approved by shareholders. The Plan amendment increased the maximum number of shares that may be subject to awards to 9,000,000 shares and to extend the Plan’s termination date to February 19, 2025. The purpose of this plan is to permit grants of shares, subject to restrictions, to employees of the Company as a means of retaining and rewarding them for performance and to increase their ownership in the Company. Shares awarded under the plan entitle the shareholder to all rights of common stock ownership except that the shares may not be sold, transferred, pledged, exchanged or otherwise disposed of during the restriction period. The restriction period is determined by a committee, appointed by the Board of Directors, but may not exceed ten years. The Company has 1,532,480 shares outstanding and has issued 4,477,580 shares under the plan as of December 31, 2016. During 2016, 2015, and 2014, 246,660, 229,660 and 431,880 shares, respectively, were granted with a restriction period of five years, and cliff vest after the restriction period with no additional restrictions, at market prices ranging from $14.70 to $19.69 in 2016, $15.50 to $18.30 in 2015, and $13.39 to $18.31 in 2014, and has unearned stock-based compensation of $11,063,638 associated with these restricted stock grants. The unearned stock-based compensation related to these grants is being amortized to compensation expense over the applicable restriction periods. Amortization expense of restricted stock for years ended December 31, 2016, 2015 and 2014 was $3,885,042, $3,486,242. and $3,095,136 respectively.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65895303&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68057994&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 + Details
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