Rendering

Component: (Network and Table)
Network
2311301 - Disclosure - Stock-Based Compensation (Tables)
(http://www.aleris.com/role/StockBasedCompensationTables)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001518587 (http://www.sec.gov/CIK)
Share-based Compensation [Abstract]Period [Axis]
2016-01-01 - 2016-12-31
Share-based Compensation [Abstract]
 
Schedule of Share-based Compensation, Stock Options, Activity
A summary of stock option activity for the year ended December 31, 2016 is as follows:
 
 
 
 
Weighted
 
Weighted average
 
Weighted
 
 
 
 
average
 
 remaining
 
average
 
 
 
 
exercise price
 
contractual
 
grant date
Service-based options
 
Options
 
per option
 
term in years
 
fair value
Outstanding at January 1, 2016
 
2,380,616

 
$
23.87

 
 
 
$
10.31

Exercised
 
(205,815
)
 
16.78

 
 
 
8.61

Forfeited
 
(175,635
)
 
28.74

 
 
 
9.04

Outstanding at December 31, 2016
 
1,999,166

 
$
24.17

 
5.1
 
$
10.60

Options vested and expected to vest at December 31, 2016
 
1,999,166

 
$
24.17

 
5.1
 
$
10.60

Options exercisable at December 31, 2016
 
1,600,617

 
$
23.86

 
4.4
 
$
10.15

  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table summarizes the significant assumptions used to determine the fair value of the stock options granted during the years ended December 31, 2015 and 2014. There were no stock options granted during the year ended December 31, 2016.
 
 
For the years ended December 31,
 
 
2015
 
2014
Weighted average expected option life in years
 
6.0

 
6.0

Weighted average grant date fair value
 
$10.54
 
$14.29
Risk-free interest rate
 
1.5% - 1.6%

 
2.0
%
Equity volatility factor
 
45% - 50%

 
55
%
Dividend yield
 
—
%
 
—
%
Intrinsic value of options exercised
 
$4.4
 
$0.1
  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
A summary of restricted stock units activity for the year ended December 31, 2016 is as follows:
 
 
 
 
Weighted
 
 
 
 
average
 
 
 
 
grant date
Restricted Stock Units
 
Shares
 
fair value
Outstanding at January 1, 2016
 
250,142

 
$
25.97

Granted
 
34,173

 
23.70

Vested
 
(103,985
)
 
25.88

Forfeited
 
(10,794
)
 
24.74

Outstanding at December 31, 2016
 
169,536

 
$
25.64