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STOCK-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2019
STOCK-BASED COMPENSATION |
Weighted-average assumptions used to estimate fair value of stock options granted | ​
​ | ​ | ​ | ​
Stock Awards Plans: |  | ​ | ​
Nine Months Ended September 30, | ​ | 2018 |
Dividend Yield |  | 1.5 | %
Expected Stock Price Volatility |  | 14.2 | %
Risk-free Interest Rate |  | 2.8 | %
Expected Life of Option (years) |  | 6.6 | ​
Summary of option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Stock Awards Plans | ​ | Director Stock Option Plans |
​ |  | ​ | ​ |  | Weighted Average |  | ​ |  | Weighted Average |
​ | ​ | ​ | Options | ​ | Exercise Price | ​ | Options | ​ | Exercise Price |
Outstanding, January 1, 2019 |  | ​ | 6,761,055 | ​ | $ | 65.76 |  | 155,200 | ​ | $ | 58.13 | ​
Granted |  | ​ | — | ​ |  | — |  | — | ​ |  | — | ​
Exercised |  | ​ | (1,382,639) | ​ |  | 57.24 |  | (14,200) | ​ |  | 62.33 | ​
Forfeited or expired |  | ​ | (131,067) | ​ |  | 71.67 |  | — | ​ |  | — | ​
Outstanding at September 30, 2019 |  | ​ | 5,247,349 | ​ | $ | 67.96 |  | 141,000 | ​ | $ | 57.71 | ​
Exercisable at September 30, 2019 |  | ​ | 4,464,502 | ​ | $ | 65.61 |  | 141,000 | ​ | $ | 57.71 | ​
Weighted-Average Remaining Contractual Term (Years): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at September 30, 2019 |  | ​ | 5.6 | ​ | ​ | ​ | ​ | 3.3 | ​ |  | ​ | ​
Exercisable at September 30, 2019 |  | ​ | 5.1 | ​ | ​ | ​ | ​ | 3.3 | ​ |  | ​ | ​
Aggregate Intrinsic Value: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at September 30, 2019 | ​ | $ | 263,304 | ​ | ​ | ​ | $ | 8,508 | ​ | ​ | ​ | ​
Exercisable at September 30, 2019 | ​ | $ | 234,118 | ​ | ​ | ​ | $ | 8,508 | ​ | ​ | ​ | ​
Intrinsic Value of Options Exercised During the Nine Months Ended: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
September 30, 2019 | ​ | $ | 76,797 | ​ | ​ | ​ | $ | 722 | ​ | ​ | ​ | ​
September 30, 2018 | ​ | $ | 62,895 | ​ | ​ | ​ | $ | 2,187 | ​ | ​ | ​ | ​
Weighted-average assumptions used to estimate fair value of restricted stock units | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nine Months Ended September 30, | ​ | ​ | 2019 | ​ | ​ | ​ | 2018 | ​ |
Fair value per stock award | ​ | $ | 134.97 | ​ | ​ | $ | 128.70 | ​ | ​
Grant date stock price | ​ | $ | 104.51 | ​ | ​ | $ | 89.42 | ​ | ​
Assumptions: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Aptar's stock price expected volatility | ​ | ​ | 16.50 | % | ​ | ​ | 12.30 | % | ​
Expected average volatility of peer companies | ​ | ​ | 31.90 | % | ​ | ​ | 27.50 | % | ​
Correlation assumption | ​ | ​ | 37.40 | % | ​ | ​ | 20.20 | % | ​
Risk-free interest rate | ​ | ​ | 2.19 | % | ​ | ​ | 2.42 | % | ​
Dividend yield assumption | ​ | ​ | 1.30 | % | ​ | ​ | 1.43 | % | ​
Summary of restricted stock unit activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Time-Based RSUs | ​ | Performance-Based RSUs |
​ |  |  |  | Weighted Average |  | ​ |  | Weighted Average | ​
​ | ​ | Units | ​ | Grant-Date Fair Value | ​ | Units | ​ | Grant-Date Fair Value | ​
Nonvested at January 1, 2019 | ​ | 261,487 | ​ | $ | 91.78 | ​ | 69,990 | ​ | $ | 111.55 | ​
Granted | ​ | 173,333 | ​ |  | 92.63 | ​ | 123,246 | ​ |  | 119.35 | ​
Vested | ​ | (46,912) | ​ | ​ | 87.38 | ​ | — | ​ | ​ | — | ​
Forfeited | ​ | (22,613) | ​ |  | 98.82 | ​ | (9,237) | ​ |  | 117.45 | ​
Nonvested at September 30, 2019 | ​ | 365,295 | ​ | $ | 92.32 | ​ | 183,999 | ​ | $ | 117.34 | ​

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of restricted stock units, including, but not limited to: (a) expected term of restricted stock units and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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