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Stock Option And Stock Award Plans (Tables)
 12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary Of Stock Options Outstanding
A summary of stock options outstanding at December 31, 2016, 2015 and 2014, and changes during those years, is presented below:
 
 
 
Option Exercise Price/Share
  
Number of
Options
 
Range
 
Weighted
Average
Outstanding at January 1, 2014
1,046,800

 
$
14.06

 
to
 
$
30.01

 
$
19.06

Granted
181,476

 
19.84

 
to
 
22.49

 
22.41

Forfeited and Expired
(22,581
)
 
15.80

 
to
 
24.84

 
21.42

Exercised
(41,575
)
 
15.80

 
to
 
19.84

 
17.55

Outstanding at December 31, 2014
1,164,120

 
14.06

 
to
 
30.01

 
19.59

Granted
—

 
—

 
to
 
—

 
—

Forfeited and Expired
(60,207
)
 
17.13

 
to
 
30.01

 
22.30

Exercised
(222,400
)
 
14.06

 
to
 
19.84

 
16.34

Outstanding at December 31, 2015
881,513

 
17.13

 
to
 
30.01

 
20.22

Granted
—

 
—

 
to
 
—

 
—

Forfeited and Expired
(246,394
)
 
17.13

 
to
 
30.01

 
18.90

Exercised
(134,200
)
 
17.13

 
to
 
19.84

 
17.23

Outstanding at December 31, 2016
500,919

 
$
17.13

 
to
 
$
30.01

 
$
21.67
Summary Of Additional Information On Stock Options Outstanding And Exercisable
The following table summarizes additional information about stock options outstanding and exercisable at December 31, 2016:
 
 
 
 
 
 
Options Outstanding at
December 31, 2016
 
Options Exercisable at
December 31, 2016
 
 
 
 
 
 
 
 
Weighted Average
 
Aggregate Intrinsic Value
(In Thousands)
 
 
 
 
 
Aggregate Intrinsic Value
(In Thousands)
Range of
Exercise Prices
 
Shares
 
Remaining Contractual Life (Years)
 
Exercise
Price
 
 
Shares
 
Weighted
Average
Exercise
Price
 
$
—

 
to
 
$
15.00

 
—

 
0.0
 
$
—

 
$
—

 
—

 
$
—

 
$
—

15.01

 
to
 
17.50

 
13,000

 
0.1
 
17.13

 
89,310

 
13,000

 
17.13

 
89,310

17.51

 
to
 
20.00

 
226,425

 
2.8
 
19.59

 
999,156

 
226,425

 
19.59

 
999,156

20.01

 
to
 
25.00

 
258,694

 
6.5
 
23.63

 
201,274

 
211,542

 
23.74

 
149,553

25.01

 
to
 
30.01

 
2,800

 
6.6
 
30.01

 
—

 
2,100

 
30.01

 
—

Total
 
500,919

 
4.6
 
$
21.67

 
$
1,289,740

 
453,067

 
$
21.50

 
$
1,238,019
Summary Of Additional Information On Non-Vested Restricted Stock Outstanding
The following table summarizes additional information about unvested restricted stock outstanding at December 31, 2016, 2015 and 2014:
 
Unvested Restricted Stock
 
Maximum Unvested Restricted Stock Units Issuable Upon Satisfaction of Certain Performance Criteria
 
Number
of Shares
 
Weighted Avg. Grant Date Fair Value/Share
 
Grant Date
Fair Value
(In Thousands)
 
Number
of Shares
 
Weighted Avg. Grant Date Fair Value/Share
 
Grant Date
Fair Value
(In Thousands)
Outstanding at January 1, 2014
157,850

 
$
22.00

 
$
3,473

 
132,300

 
$
23.81

 
$
3,150

Granted
95,707

 
22.18

 
2,123

 
59,675

 
21.54

 
1,285

Vested
(54,921
)
 
20.73

 
(1,139
)
 
—

 
—

 
—

Forfeited
(10,578
)
 
21.76

 
(230
)
 
(62,262
)
 
19.18

 
(1,194
)
Outstanding at December 31, 2014
188,058

 
22.48

 
4,227

 
129,713

 
24.99

 
3,241

Granted
147,666

 
18.87

 
2,786

 
144,582

 
18.47

 
2,670

Vested
(174,145
)
 
20.57

 
(3,582
)
 
—

 
—

 
—

Forfeited
(29,226
)
 
21.42

 
(626
)
 
(107,167
)
 
20.78

 
(2,227
)
Outstanding at December 31, 2015
132,353

 
21.19

 
2,805

 
167,128

 
22.04

 
3,684

Granted
144,546

 
13.47

 
1,947

 
136,986

 
11.34

 
1,553

Vested
(52,167
)
 
21.56

 
(1,125
)
 
—

 
—

 
—

Forfeited
(17,377
)
 
18.97

 
(330
)
 
(65,685
)
 
20.24

 
(1,329
)
Outstanding at December 31, 2016
207,355

 
$
15.90

 
$
3,297

 
238,429

 
$
16.39

 
$
3,908