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Share-based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2019
Share-based Payment Arrangement [Abstract] |
Summary of Valuation Assumptions | The fair value of each option grant was estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions shown as a weighted average for the year:
|  | June 30, 2019 |  | June 30, 2018
Expected option life (in years) |  | — |  | 0.88 - 5.84
Risk-free interest rate |  | —% |  | 2.24 - 2.85%
Expected volatility |  | —% |  | 47.51 - 47.89%
Dividend yield |  | —% |  | —%
Summary of Company's Restricted Stock Activity | A summary of HC2’s restricted stock activity is as follows:
|  | Shares |  | Weighted Average Grant Date Fair Value
Unvested - December 31, 2018 |  | 3,031,469 |  |  | $ | 5.93 |
Granted |  | 542,450 |  |  | $ | 2.57 |
Vested |  | (1,144,831 | ) |  | $ | 6.07 |
Forfeited |  | (5,842 | ) |  | $ | 3.14 |
Unvested - June 30, 2019 |  | 2,423,246 |  |  | $ | 5.12 |
Summary of Company's Stock Option Activity | A summary of HC2’s stock option activity is as follows:
|  | Shares |  | Weighted Average Exercise Price
Outstanding - December 31, 2018 |  | 7,160,861 |  |  | $ | 6.51 |
Granted |  | — |  |  | $ | — |
Exercised |  | — |  |  | $ | — |
Forfeited |  | — |  |  | $ | — |
Expired |  | (93,269 | ) |  | $ | 5.47 |
Outstanding - June 30, 2019 |  | 7,067,592 |  |  | $ | 6.52 |
Eligible for exercise |  | 6,613,099 |  |  | $ | 6.59 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(1) -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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- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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