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Share-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares of Company Common Stock Available Under Share-Based Plans
Shares of Common Stock Available Under Share-Based Plans
 
 
As of December 31, 2014
 
 
Shares
Authorized
 
Shares Available
For Grant
Omnibus Plan
 
8,631,641

 
2,237,337

Directors Plan
 
481,250

 
75,294
Schedule of Other Share-based Compensation, Activity
Salary Stock Awards Granted
 
 
Years ended December 31,
 
 
2014
 
2013
 
2012
Shares granted
 
—

 
8,693

 
10,983

Weighted-average price
 
$
—

 
$
14.30

 
$
11.51
Schedule of Share-based Compensation, Stock Options, Activity
Nonqualified Stock Option Transactions
(Amounts in thousands, except per share data)
 
 
Year Ended December 31, 2014
 
 
Number of Options
 
Weighted Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term (1)
 
Aggregate
Intrinsic
Value (2)
Options outstanding beginning balance
 
1,436

 
$
32.99

 
 
 
 

Expired
 
(283
)
 
33.23

 
 
 
 

Options outstanding ending balance
 
1,153

 
$
32.93

 
1.62
 
$
215

Exercisable at the end of the year
 
1,153

 
$
32.93

 
1.62
 
$
215


(1) 
Represents the average remaining contractual life in years.
(2) 
Aggregate intrinsic value represents the total pre-tax intrinsic value that would have been received by the option holders if they had exercised their options on December 31, 2014. Intrinsic value equals the difference between the Company's average of the high and low stock price on the last trading day of the year and the option exercise price, multiplied by the number of shares. This amount will fluctuate with changes in the fair value of the Company's common stock.
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
Restricted Stock, Restricted Stock Unit, and Performance Share Award Transactions
(Amounts in thousands, except per share data)
 
 
Year Ended December 31, 2014
 
 
Restricted Stock/Unit Awards
 
Performance Shares
 
 
Number of
Shares/Units
 
Weighted
Average
Grant Date
Fair Value
 
Number of
Shares
 
Weighted
Average
Grant Date
Fair Value
Non-vested awards beginning balance
 
1,123

 
$
12.10

 
127

 
$
12.68

Granted
 
417

 
16.13

 
118

 
16.13

Vested
 
(474
)
 
11.79

 
—

 
11.79

Forfeited
 
(69
)
 
13.53

 
(7
)
 
13.53

Non-vested awards ending balance
 
997

 
$
13.79

 
238

 
$
14.36
Schedule of Share-based Compensation, Activity
Effect of Recording Share-Based Compensation Expense
(Dollar amounts in thousands)
 
 
Years ended December 31,
 
 
2014
 
2013
 
2012
Restricted stock, restricted unit, and performance share
  award expense
 
$
5,926

 
$
5,779

 
$
5,877

Salary stock award expense
 
—

 
124

 
127

Total share-based compensation expense
 
5,926

 
5,903

 
6,004

Income tax benefit
 
2,424

 
2,414

 
2,456

Share-based compensation expense, net of tax
 
$
3,502

 
$
3,489

 
$
3,548

Unrecognized compensation expense
 
$
6,937

 
$
6,327

 
$
5,674

Weighted-average amortization period remaining (in years)
 
1.3

 
1.2

 
1.1
Restricted Stock  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Other Share-based Compensation, Activity
Other Restricted Stock, Restricted Stock Unit, and Performance Share Award Information
(Amounts in thousands, except per share data)
 
 
Years Ended December 31,
 
 
2014
 
2013
 
2012
Weighted-average grant date fair value of restricted stock, restricted stock unit, and
  performance share awards granted during the year
 
$
16.13

 
$
13.01

 
$
11.35

Total fair value of restricted stock and restricted stock unit awards vested during
  the year
 
7,546

 
4,917

 
4,921

Income tax benefit realized from the vesting/release of restricted stock and
  restricted stock unit awards
 
2,939

 
1,966

 
1,884