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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Stock compensation consisted of the following:
 
Years Ended December 31,
 
2013
 
2012
 
2011
 
(In millions)
Stock compensation expense
$
6.3

 
$
6.6

 
$
6.9
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table summarizes our weighted average assumptions used in the valuation of options for the years ended December 31:
 
2013
 
2012
 
2011
Volatility
43
%
 
45
%
 
44
%
Risk-free interest rate
1.05
%
 
1.07
%
 
2.13
%
Expected life (months)
72

 
71

 
70

Dividend yield
—
%
 
—
%
 
—
%
Schedule of Share-based Compensation, Stock Options, Activity
The following table summarizes our stock option activity:
 
Stock Options
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Life (Years)
 
Aggregate Intrinsic Value
 
 
 
 
 
 
 
(millions)
Outstanding December 31, 2010
4,916,088

 
$
24.10

 
5.6
 
$
0.7

Granted
1,401,163

 
9.41

 
 
 
 
Exercised
(45,429
)
 
10.13

 
 
 
 
Canceled
(475,703
)
 
35.11

 
 
 
 
Forfeited
(116,540
)
 
14.34

 
 
 
 
Outstanding December 31, 2011
5,679,579

 
$
19.87

 
6.0
 
$
—

Granted
1,178,780

 
5.80

 
 
 
 
Exercised
—

 
—

 
 
 
 
Canceled
(752,415
)
 
26.61

 
 
 
 
Forfeited
(287,472
)
 
9.24

 
 
 
 
Outstanding December 31, 2012
5,818,472

 
$
16.57

 
5.9
 
$
—

Granted
1,034,406

 
3.85

 
 
 
 
Exercised
—

 
—

 
 
 
 
Canceled
(1,069,192
)
 
25.22

 
 
 
 
Forfeited
(412,148
)
 
7.13

 
 
 
 
Outstanding December 31, 2013
5,371,538

 
$
13.11

 
6.1
 
$
0.8
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
The following table summarizes exercisable options and options expected to vest as of December 31, 2013:
 
Exercisable Options
 
Options Expected to Vest
 
 
 
Weighted
Average
Remaining
 
Weighted
Average
 
 
 
Weighted
Average
Remaining
 
Weighted
Average
Range of Exercise
Stock
 
Contractual
 
Exercise
 
Stock
 
Contractual
 
Exercise
Prices
Options
 
Life (Years)
 
Price
 
Options
 
Life (Years)
 
Price
$3.48 to $6.16
287,915

 
8.1
 
$
5.75

 
1,381,213

 
8.8
 
$
4.57

$6.17 to $9.64
509,312

 
5.7
 
8.60

 
77,456

 
7.9
 
7.12

$9.65 to $19.20
1,325,913

 
5.6
 
10.10

 
355,502

 
7.0
 
9.96

$19.21 to $23.95
9,500

 
4.2
 
20.20

 
—

 
0.0
 
—

$23.96 to $28.70
521,320

 
3.2
 
24.49

 
—

 
0.0
 
—

$28.71 to $39.38
475,438

 
1.8
 
36.01

 
—

 
0.0
 
—

$39.39 to $41.75
228,775

 
1.5
 
41.24

 
—

 
0.0
 
—

$41.76 to $46.97
2,500

 
2.4
 
45.76

 
—

 
0.0
 
—

$3.48 to $46.97
3,360,673

 
4.7
 
$
17.57

 
1,814,171

 
8.4
 
$
5.73
Schedule of Share-based Compensation, Restricted Stock Activity
The following table summarizes our restricted stock activity:
 
Restricted Stock
 
Weighted Average Grant Date Fair Value Per Share
Nonvested as of December 31, 2010
739,196

 
$
11.34

Granted
385,049

 
9.28

Vested
(274,934
)
 
12.15

Forfeited
(54,265
)
 
12.05

Nonvested as of December 31, 2011
795,046

 
$
10.02

Granted
708,573

 
5.67

Vested
(321,103
)
 
10.30

Forfeited
(156,712
)
 
8.72

Nonvested as of December 31, 2012
1,025,804

 
$
7.12

Granted
837,443

 
3.75

Vested
(561,099
)
 
6.99

Forfeited
(109,827
)
 
6.59

Nonvested as of December 31, 2013
1,192,321

 
$
4.87