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Stock-Based Compensation and Directors Stock Purchase Plan (Tables)
 12 Months Ended
Dec. 31, 2014
Share-based Compensation [Abstract]  
Summary Of The Status Of Nonvested Share Awards
A summary of the status of the Company’s nonvested share awards as of December 31, 2014 and changes during the year then ended is presented below.

  
 

Shares
Weighted Average Grant Date Fair Value
Nonvested at January 1, 2014
1,200,750

32.64

Granted
195,177

42.48

Vested
(107,299
)
28.51

Forfeited
(28,689
)
36.85

Nonvested at December 31, 2014
1,259,939

34.41
Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Table Text Block]
The per share average fair value and the model assumptions for SARs granted in 2014 are 2013 shown in the table below.
 
2014
2013
Weighted per share average fair value at grant date

$8.82


$6.49

Assumptions:
 
 
Dividend yield
2.0
%
2.3
%
Volatility
22.1
%
23.2
%
Risk-free interest rate
2.3
%
1.2
%
Expected term
7.1 years

7.3 years
Summary Of Option Activity
A summary of stock option activity during 2014 is presented below.
(Dollars in thousands, except per share data)
Shares
Weighted Average Exercise Price
Weighted Average Remaining Contractual Term
Aggregate Intrinsic Value
Outstanding at January 1, 2014
474,894

29.10

 
 
 
Granted
—

—

 
 
 
Forfeited
—

—

 
 
 
Expired
(1,462
)
29.22

 
 
 
Exercised
(404,757
)
29.07

 
 
 
Outstanding, exercisable and vested at December 31, 2014
68,675

$
29.27

0.2
years
$
977
Summary Of SAR Activity
A summary of SAR activity during 2014 is presented below.
(Dollars in thousands, except per share data)
Shares
Weighted Average Exercise Price
Weighted Average Remaining Contractual Term
Aggregate Intrinsic Value
Outstanding at January 1, 2014
1,845,863

$
33.03

 
 
 
Granted
181,556

42.40

 
 
 
Forfeited
(2,478
)
39.37

 
 
 
Expired
(7,084
)
32.44

 
 
 
Exercised
(237,279
)
33.12

 
 
 
Outstanding at December 31, 2014
1,780,578

$
33.96

3.7
years
$
16,966

Exercisable at December 31, 2014
1,425,874

$
32.72

2.5
years
$
15,356

Vested and expected to vest at December 31, 2014
1,763,892

$
33.92

3.7
years
$
16,885
Schedule Of Additional Information About Stock Options and SARs Exercises
Additional information about stock options and SARs exercised is presented below.
(In thousands)
2014
2013
2012
Intrinsic value of options and SARs exercised
$
8,068

$
6,580

$
7,769

Cash received from options and SARs exercised
$
8,652

$
9,426

$
14,820

Tax benefit realized from options and SARs exercised
$
1,153

$
335

$
1,269