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Share-Based Employee Compensation (Tables)
 12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Shares Authorized, Available for Future Grant and Outstanding Under Each Plans
The following table presents shares authorized, available for future grant and outstanding under each of the Company’s plans as of December 31, 2015:
 
Authorized
 
Available
 
Outstanding(1)
 
(In thousands)
2004 Incentive Plan
24,000

 
6,915

 
4,782

2013 Directors Plan
1,000

 
852

 
99

Total
25,000

 
7,767

 
4,881

 

(1)
Includes accrued incremental dividend equivalent rights on outstanding shares underlying restricted stock units granted under the 2004 Incentive Plan and 2013 Directors Plan.
Average Fair Value Assumptions Used in Valuation of Stock Options Granted
The table below summarizes the average fair value assumptions used in the valuation of stock options granted during the year ended December 31, 2013.
 
2013
Dividend yield
0.6
%
Expected volatility
48.8
%
Risk-free interest rate
0.7
%
Expected life
4.3 years
Stock Option Activities
The following table summarizes the Company’s stock option activities for the year ended December 31, 2015 (in thousands, except price per share and contractual term):
Options
Number of
Shares
 
Weighted-
Average
Exercise Price
Per Share
 
Weighted-
Average
Remaining
Contractual
Term
 
Aggregate
Intrinsic
Value
Outstanding at January 1, 2015
3,659

 
$
8.59

 
 
 
 
Granted
—

 
$
—

 
 
 
 
Exercised
(914
)
 
$
7.18

 
 
 
 
Forfeited
—

 
$
—

 
 
 
 
Expired
(320
)
 
$
12.88

 
 
 
 
Outstanding at December 31, 2015
2,425

 
$
8.55

 
4.93
 
$
4,889

Vested and expected to vest in the future at December 31, 2015
2,420

 
$
8.55

 
4.92
 
$
4,874

Exercisable at December 31, 2015
1,897

 
$
9.11

 
4.92
 
$
3,370
Roll-Forward of Activity for Restricted Stock Units
The table below is a roll-forward of the activity for restricted stock units during the 12 months ended December 31, 2015 (in thousands, except fair value amounts):
Restricted Stock Units
Units
 
Weighted-
Average
Grant-Date
Fair Value
Nonvested at January 1, 2015
1,223

 
$
7.07

Granted
564

 
8.33

Vested
(470
)
 
6.56

Forfeited
(49
)
 
8.15

Nonvested at December 31, 2015
1,268

 
$
7.77
Roll-Forward of Activity for Performance Share Units
The table below is a roll-forward of the activity for performance share units during the 12 months ended December 31, 2015 (in thousands, except fair value amounts):
Performance Share Units
Units
 
Weighted-
Average
Grant-Date
Fair Value
Nonvested at January 1, 2015
453

 
$
8.20

Granted
510

 
7.96

Vested
—

 
—

Forfeited
(63
)
 
8.14

Nonvested at December 31, 2015
900

 
$
8.07
Roll-Forward of Activity for Phantom Stock Units
The table below is a roll-forward of the activity for phantom stock units during the 12 months ended December 31, 2015 (in thousands, except fair value amounts):
Phantom Stock Units
Units
 
Weighted-
Average
Grant-Date
Fair Value
Nonvested at January 1, 2015
264

 
$
6.25

Granted
—

 
—

Vested
(264
)
 
6.25

Forfeited
—

 
—

Nonvested at December 31, 2015
—

 
$
—
Summary of Total Number of Stock Appreciation Rights Granted
The table below summarizes the total number of SARs granted to employees during the year ended December 31, 2015 (in thousands):
Stock Appreciation Rights
Units
 
Weighted-
Average
Exercise Price
Per Share
Nonvested and Outstanding at January 1, 2015
2,372

 
$
6.39

Granted
—

 
—

Exercised
(1,874
)
 
6.35

Forfeited
—

 
—

Outstanding at December 31, 2015
498

 
$
6.51
Share-Based Compensation Including Expense for Phantom Stock Units and Cash Settled Stock Appreciation Rights Granted to Employees
The table below summarizes the amounts recognized in the financial statements for the years ended December 31, 2015, 2014 and 2013 for share-based compensation, including expense for stock options, restricted stock units, performance share units, phantom stock units and cash settled stock appreciation rights (in thousands):
 
2015
 
2014
 
2013
Cost of sales
$
754

 
$
240

 
$
473

Operating expenses
10,466

 
5,087

 
7,711

Total cost of employee share-based compensation included in income (loss) before income tax
$
11,220

 
$
5,327

 
$
8,184