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SHARE BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Activity for Shares | The following table summarizes activity relating to carry units:
| Number of Time Vesting Awards |  | Number of Performance Based Vesting Awards |  | Weighted Average Grant Date Fair Value
Balance, December 31, 2017 | 168,550,001 |  |  | 10,000,000 |  |  | $ | 0.71 |
Vested | (43,462,500 | ) |  | — |  |  | 0.37 |
Forfeited | (7,375,001 | ) |  | — |  |  | 0.60 |
Balance, June 30, 2018 | 117,712,500 |  |  | 10,000,000 |  |  | 0.94 |
Stock Option Activity | The following table summarizes activity related to employee stock options for the six months ended June 30, 2018:
| Shares Under Option |  | Weighted Average Exercise Price Per Share |  | Weighted Average Remaining Contractual Term (in years) |  |
| Time Vesting |  | Performance Based Vesting |  |  |  | Aggregate Intrinsic Value (a)
Balance at December 31, 2017 | 5,110,747 |  |  | — |  |  | $ | 19.48 |  |  | 9.97 |  |  | $ | 8,944 |
Granted | 1,943,676 |  |  | 95,953 |  |  | 18.34 |  |  |  |  |
Forfeited | (179,705 | ) |  | (22,314 | ) |  | 20.94 |  |  |  |  |
Balance at June 30, 2018 | 6,874,718 |  |  | 73,639 |  |  | 19.10 |  |  | 9.30 |  |  | (14,202 | )
Options exercisable at June 30, 2018 | — |  |  | — |  |  | — |  |  | — |  |  | — |
(a) | The aggregate intrinsic value is calculated as the difference between the exercise price and the closing price of the Company's Class A common stock at the respective date.
Aggregate Assumptions Used to Calculated the Fair Values of Stock Options | The following aggregate assumptions were used to calculate the fair values of stock option awards granted during the six months ended June 30, 2018:
Risk-free interest rate |  | 2.75%
Expected life (in years) |  | 6.49
Dividend yield |  | —%
Volatility |  | 35.16%
Grant date fair value |  | $7.08

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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 (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&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://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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