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Stock-Based Compensation Plans Stock Option & SARS activity (Tables)
 12 Months Ended
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block]
The following table summarizes stock options and stock appreciation rights activity:
 
2015
 
2014
 
2013
 
 
 
Weighted-
Average
Exercise
Price Per
Share
 
 
 
Weighted-
Average
Exercise
Price Per
Share
 
 
 
Weighted-
Average
Exercise
Price Per
Share
(in thousands, except per share amounts)
Shares
 
 
Shares
 
 
Shares
 
Outstanding at January 1,
5,224

 
$
3.85

 
6,128

 
$
3.66

 
9,538

 
$
4.04

Granted *
—

 
—

 
998

 
3.41

 
595

 
4.75

Exercised
(33
)
 
1.94

 
(725
)
 
1.73

 
(804
)
 
2.41

Forfeited
(499
)
 
3.75

 
(215
)
 
3.99

 
(361
)
 
3.39

Expired
(812
)
 
4.00

 
(962
)
 
3.73

 
(2,840
)
 
5.56

Outstanding at December 31,
3,880

 
$
3.86

 
5,224

 
$
3.85

 
6,128

 
$
3.66

Expected to vest at December 31,
3,880

 
$
3.86

 
5,224

 
$
3.85

 
6,128

 
$
3.66

Exercisable at December 31,
3,175

 
$
3.93

 
3,477

 
$
3.98

 
5,064

 
$
3.61

 
 
 
 
 
 
 
 
 
 
 
 
(dollars in millions)
 
 
 
 
 
 
 
 
 
 
 
Compensation expense for the year
$
—

 
 
 
$
0.3

 
 
 
$
0.6

 
 
Tax benefit related to compensation expense
$
—

 
 
 
$
(0.1
)
 
 
 
$
(0.2
)
 
 
Intrinsic value of awards exercised
$
0.1

 
 
 
$
1.5

 
 
 
$
1.2

 
 
Cash received from awards exercised
$
0.1

 
 
 
$
1.3

 
 
 
$
2.4

 
 
Grant date fair value of awards vested
$
0.7

 
 
 
$
0.4

 
 
 
$
0.4

 
 
 
 
 
 
 
 
 
 
 
 
 
 
* Assumes the maximum number of awards that can be earned if the performance conditions are achieved.
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
The following table summarizes our outstanding and exercisable awards at December 31, 2015:
 
Outstanding
 
Exercisable
 
 
 
Weighted-
Average
Exercise
Price Per
Share
 
 
 
Weighted-
Average
Exercise
Price Per
Share
(in thousands, except per share amounts)
Shares
 
 
Shares
 
$1.67 to $2.91
564

 
$
2.49

 
564

 
$
2.49

$3.40 to $4.62
1,788

 
3.46

 
1,146

 
3.49

$4.74 to $5.31
1,528

 
4.82

 
1,465

 
4.83

Total
3,880

 
$
3.86

 
3,175

 
$
3.93
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The fair values at the date of grant were estimated using the Black-Scholes pricing model with the following assumptions:
 
2015
2014
2013
Expected volatility
—

35.5
%
43.6
%
Risk-free interest rate
—

1.5
%
0.8
%
Expected holding period (in years)
—

5

5

Expected dividends
—

0.0
%
0.0
%
Weighted-average grant date fair value
$
—

$
1.14

$
1.84
Performance Based Awards [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Nonvested Share Activity [Table Text Block]
The following table summarizes our outstanding performance-based restricted award activity:
 
2015
 
2014
 
2013
 
 
 
Weighted-
Average
Exercise
Price Per
Share
 
 
 
Weighted-
Average
Exercise
Price Per
Share
 
 
 
Weighted-
Average
Exercise
Price Per
Share
(in thousands, except per share amounts)
Shares
 
 
Shares
 
 
Shares
 
Non-vested at January 1,
1,746

 
$
3.85

 
1,537

 
$
3.97

 
1,687

 
$
3.13

Granted*
2,692

 
3.09

 
1,085

 
3.56

 
1,067

 
4.56

Vested
(445
)
 
3.80

 
(635
)
 
3.71

 
(703
)
 
3.07

Forfeited
(386
)
 
3.28

 
(241
)
 
3.65

 
(514
)
 
3.67

Non-vested at December 31,
3,607

 
$
3.35

 
1,746

 
$
3.85

 
1,537

 
$
3.97

 
 
 
 
 
 
 
 
 
 
 
 
(dollars in millions)
 
 
 
 
 
 
 
 
 
 
 
Compensation expense for the year
$
3.1

 
 
 
$
1.4

 
 
 
$
2.6

 
 
Tax benefit related to compensation expense
$
(1.1
)
 
 
 
$
(0.5
)
 
 
 
$
(1.0
)
 
 
Grant date fair value of awards vested
$
1.7

 
 
 
$
2.3

 
 
 
$
2.2

 
 
 
 
 
 
 
 
 
 
 
 
 
 
* Assumes the maximum number of awards that can be earned if the performance conditions are achieved.
Restricted Stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Nonvested Share Activity [Table Text Block]
The following table summarizes our time-based restricted award activity: 
 
2015
 
2014
 
2013
 
 
 
Weighted-
Average
Exercise
Price Per
Share
 
 
 
Weighted-
Average
Exercise
Price Per
Share
 
 
 
Weighted-
Average
Exercise
Price Per
Share
(in thousands, except per share amounts)
Shares
 
 
Shares
 
 
Shares
 
Non-vested at January 1,
684

 
$
3.70

 
1,044

 
$
3.55

 
1,298

 
$
3.11

Granted
180

 
3.47

 
176

 
3.19

 
279

 
4.72

Vested
(630
)
 
3.54

 
(514
)
 
3.25

 
(454
)
 
3.03

Forfeited
—

 
—

 
(22
)
 
3.19

 
(79
)
 
3.40

Non-vested at December 31,
234

 
$
3.96

 
684

 
$
3.70

 
1,044

 
$
3.55

 
 
 
 
 
 
 
 
 
 
 
 
(dollars in millions)
 
 
 
 
 
 
 
 
 
 
 
Compensation expense for the year
$
1.0

 
 
 
$
1.6

 
 
 
$
1.7

 
 
Tax benefit related to compensation expense
$
(0.3
)
 
 
 
$
(0.6
)
 
 
 
$
(0.6
)
 
 
Grant date fair value of awards vested
$
2.2

 
 
 
$
1.7

 
 
 
$
1.4