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STOCK-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2018
STOCK-BASED COMPENSATION |
Schedule of weighted-average assumptions used to estimate the fair value of options granted |
|  | Three-Months Ended September 30, |  | Nine-Months Ended September 30, |
|  | 2018 |  | 2017 |  | 2018 |  | 2017 |
Dividend yield |  | 0.0% |  | 0.0% |  | 0.0% |  | 0.0% |
Expected volatility |  | 34.5% |  | 35.3% |  | 34.9% |  | 36.6% |
Risk-free interest rate |  | 2.9% |  | 1.7% |  | 2.8% |  | 2.1% |
Expected term |  | 6.1 years |  | 5.9 years |  | 6.1 years |  | 6.1 years |
Summary of Company's activities with respect to its stock option plans |
Options |  | Number of Shares (in thousands) |  | Weighted- Average Exercise Price Per Share |  | Weighted- Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value |
Outstanding at January 1, 2018 |  | 17,819 |  | $ | 29.62 |  | 6.1 |  | $ | 600,032 |
Granted 01/01/18 - 03/31/18 |  | 2,615 |  | $ | 58.76 |  |  |  |  |
Granted 04/01/18 - 06/30/18 |  | 360 |  | $ | 51.72 |  |  |  |  |
Granted 07/01/18 - 09/30/18 |  | 11 |  | $ | 58.77 |  |  |  |  |
Exercised |  | (1,308) |  | $ | 18.71 |  |  |  |  |
Cancelled or forfeited |  | (495) |  | $ | 43.71 |  |  |  |  |
Outstanding at September 30, 2018 |  | 19,002 |  | $ | 34.45 |  | 6.1 |  | $ | 454,476 |
Vested and expected to vest in the |  |  |  |  |  |  |  |  |
future at September 30, 2018 |  | 18,061 |  | $ | 33.59 |  | 5.9 |  | $ | 447,291 |
Exercisable at September 30, 2018 |  | 10,179 |  | $ | 22.51 |  | 4.3 |  | $ | 364,103 |
Summary of Company's activities with respect to non-vested restricted stock units |
|  | Number of Shares (in thousands) |  | Weighted Average Grant-Date Fair Value |
Non-vested at January 1, 2018 |  | 530 |  | $ | 45.09 |
Granted 01/01/18- 03/31/18 |  | 221 |  | $ | 58.75 |
Granted 04/01/18- 06/30/18 |  | 48 |  | $ | 52.31 |
Granted 07/01/18 - 09/30/18 |  | 1 |  | $ | 58.72 |
Vested |  | (263) |  | $ | 45.36 |
Forfeited/cancelled |  | (7) |  | $ | 33.60 |
Non-vested at September 30, 2018 |  | 530 |  | $ | 51.48 |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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