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Stock-Based Compensation And Directors Stock Purchase Plan (Tables)
 12 Months Ended
Dec. 31, 2011
Stock-Based Compensation And Directors Stock Purchase Plan [Abstract]  
Schedule Of Nonvested Share Awards

  
 
Shares
Weighted Average Grant Date Fair Value
Nonvested at January 1, 2011
493,847

$
34.29

Granted
218,631

38.50

Vested
(42,412
)
37.47

Forfeited
(16,284
)
33.87

Nonvested at December 31, 2011
653,782

$
35.48

Schedule Of Weighted Average Fair Value Of SARs Granted
 
2009
Weighted per share average fair value at grant date
$
6.46

Assumptions:
 
Dividend yield
2.7
%
Volatility
20.8
%
Risk-free interest rate
3.2
%
Expected term
7.3 years

Summary Of Option Activity
(Dollars in thousands, except per share data)
Shares
Weighted Average Exercise Price
Weighted Average Remaining Contractual Term
Aggregate Intrinsic Value
Outstanding at January 1, 2011
1,896,178

$
29.48

 
 
Granted
—

—

 
 
Forfeited
—

—

 
 
Expired
—

—

 
 
Exercised
(543,534
)
27.55

 
 
Outstanding at December 31, 2011
1,352,644

$
30.26

1.9 years
$
10,631

Exercisable at December 31, 2011
1,352,644

$
30.26

1.9 years
$
10,631

Vested and expected to vest at December 31, 2011
1,352,644

$
30.26

1.9 years
$
10,631

Summary Of SAR Share Activity
(Dollars in thousands, except per share data)
Shares
Weighted Average Exercise Price
Weighted Average Remaining Contractual Term
Aggregate Intrinsic Value
Outstanding at January 1, 2011
1,795,348

$
37.82

 
 
Granted
—

—

 
 
Forfeited
(4,375
)
35.80

 
 
Expired
(13,258
)
38.48

 
 
Exercised
(38,589
)
36.79

 
 
Outstanding at December 31, 2011
1,739,126

$
37.83

5.2 years
$
1,160

Exercisable at December 31, 2011
1,586,186

$
37.97

5.1 years
$
885

Vested and expected to vest at December 31, 2011
1,717,505

$
37.85

5.2 years
$
1,121

Schedule Of Additional Information About Stock Options And SARs Exercises
(In thousands)
2011
2010
2009
Intrinsic value of options and SARs exercised
$
6,722

$
7,005

$
3,249

Cash received from options and SARs exercised
$
14,604

$
10,563

$
4,729

Tax benefit realized from options and SARs exercised
$
847

$
1,042

$
636