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Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Fair Value of Each Option Grant Estimated
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:
 
 
Years Ended December 31,
 
 
2017
 
2016
 
2015
Expected option life (in years)
 
0.39 - 6.10

 
4.70 - 6.00

 
4.80 - 5.50

Risk-free interest rate
 
1.11 - 2.22%

 
1.27 - 1.35%

 
1.49 - 1.73%

Expected volatility
 
47.04 - 48.29%

 
39.58 - 55.58%

 
36.29 - 53.83%

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, 2015
 
790,688

 
$
8.14

Granted
 
301,040

 
$
3.89

Vested
 
(959,196
)
 
$
7.17

Forfeited
 
(16,611
)
 
$
5.03

Unvested - December 31, 2016
 
115,921

 
$
5.59

Granted
 
1,847,473

 
$
5.41

Vested
 
(374,988
)
 
$
5.64

Forfeited
 

 
$

Unvested - December 31, 2017
 
1,588,406

 
$
5.36

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, 2015
 
5,361,285

 
$
5.48

Granted
 
1,506,848

 
$
10.49

Exercised
 
(2,000
)
 
$
4.06

Forfeited
 
(2,800
)
 
$
4.06

Expired
 
(34,236
)
 
$
6.68

Outstanding - December 31, 2016
 
6,829,097

 
$
6.58

Granted
 
331,616

 
$
5.50

Exercised
 
(134,539
)
 
$
3.53

Forfeited
 

 
$

Expired
 
(36,318
)
 
$
9.00

Outstanding - December 31, 2017
 
6,989,856

 
$
6.57

 
 
 
 
 
Eligible for exercise
 
5,742,604

 
$
5.93