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Employee Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2018
Share-based Compensation [Abstract]  
Summary Of Stock Option Activity
A summary of the Company’s stock option activity and related information is presented below:
 
Three months ended March 31,
 
2018
2017
Options
Weighted-Average Exercise Price
Options
Weighted-Average Exercise Price
Outstanding at January 1
87,605

$
47.15

86,613

$
41.08

Granted
—

—

17,631

66.32

Exercised
(7,387
)
37.85

(1,250
)
30.38

Outstanding at March 31
80,218

$
48.00

102,994

$
45.53

 
 
 
 
 
Exerciseable at March 31
24,943

$
40.38

23,276

$
36.70


 
Information regarding stock option exercises and stock-based compensation expense associated with stock options is provided in the following table (in thousands):    
 
Three months ended March 31,
 
2018
2017
Proceeds from stock option exercises
$
280

$
38

Intrinsic value of stock options exercised
220

44

 
 
 
Stock-based compensation expense associated with stock options
$
54

$
65

 
 
 
At period-end:
March 31, 2018
 
Unrecognized stock-based compensation expense associated with stock options
$
328

 
Weighted average period (in years) in which the above amount is expected to be
 
 
   recognized
2.4

 
Stock Options Outstanding And Exercisable

Additional information regarding stock options outstanding and exercisable at March 31, 2018 is provided in the following table:
Ranges of Exercise Prices
No. of Options Outstanding
Weighted-Average Exercise Price
Weighted-Average Remaining Contractual Life (Years)
Aggregate Intrinsic Value (in thousands)
No. of Options Currently Exercisable
Weighted-Average Exercise Price of Options Currently Exercisable
Weighted-Average Remaining Contractual Life (Years)
Aggregate Intrinsic Value of Options Currently Exercisable (in thousands)
$30.00 - $34.99
500

$
30.38

0.7
$
19

500

$
30.38

0.7

$
19

35.00 - 39.99
15,475

37.74

4.9
477

15,475

37.74

4.9

477

40.00 - 44.99
33,651

43.92

7.4
829

4,650

44.43

6.0

112

45.00 - 49.99
12,961

46.61

6.9
284

4,318

46.61

6.9

95

50.00 - 70.00
17,631

66.32

8.9
40

—

—

—

—

 
80,218

 
 
$
1,649

24,943

 
 
$
703
Weighted Average Assumptions Estimate The Fair Value Of Options Granted
 The following weighted average assumptions were used to estimate the fair value of options granted:

 
Three months ended March 31,
 
2017
Risk-free interest rate
2.12
%
Expected dividend yield
2.60
%
Volatility factor
25.80
%
Expected life of option
7.0 years
Restricted Shares Activity And Related Information
A summary of the Company’s restricted shares activity and related information is presented below:
 
Three months ended March 31,
 
2018
2017
Restricted Awards
Average Market Price at Grant
Restricted Awards
Average Market Price at Grant
Outstanding at January 1
170,033

$
44.34

180,622

$
39.31

Granted
23,163

68.63

10,609

66.33

Forfeited
—

—

(750
)
42.05

Vested
(20,864
)
40.44

(18,438
)
37.50

Outstanding at March 31
172,332

$
48.08

172,043

$
41.16



Information regarding stock-based compensation associated with restricted shares is provided in the following table (in thousands):

 
Three months ended March 31,
 
2018
2017
Stock-based compensation expense associated with restricted shares
$
379

$
355

 
 
 
At period-end:
March 31, 2018
 
Unrecognized stock-based compensation expense associated with restricted shares
$
4,432

 
Weighted average period (in years) in which the above amount is expected to be
 
 
   recognized
3.5

 
Net Periodic Pension Cost Of The Defined Benefit Plan
The following table presents details of the Company's activities pursuant to these plans (in thousands):
 
Three months ended March 31,
2018
2017
Components of net periodic cost:
 
 
Interest cost
$
147

$
193

Expected return on plan assets
(270
)
(294
)
Net amortization and deferral
218

215

Net Periodic Pension Cost
$
95

$
114

 
 
 
401(k) Plan expense
$
218

$
251

 
 
 
Defined Benefit Plan contributions
$
—

$
—