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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Share
The following is an analysis of basic and diluted EPS, reflecting the application of the two-class method, as described below:

 
2013
 
2012
 
2011
Net income
$
22,783

 
$
23,428

 
$
26,177

Dividends and undistributed earnings allocated to participating securities (1)
(64
)
 
(60
)
 
(42
)
Net income available to common shareholders
$
22,719

 
$
23,368

 
$
26,135

Weighted-average common shares outstanding for basic EPS
7,634,455

 
7,646,861

 
7,672,126

Dilutive effect of stock-based awards( 2)
18,815

 
14,412

 
7,769

Weighted-average common and potential common shares for diluted EPS
7,653,270

 
7,661,273

 
7,679,895

Earnings per common share:
  

 
  

 
  

Basic EPS
$
2.98

 
$
3.06

 
$
3.41

Diluted EPS
2.97

 
3.05

 
3.40

(1) Represents dividends paid and undistributed earnings allocated to nonvested stock-based awards that contain non-forfeitable rights to dividends.
(2) Represents the effect of the assumed exercise of stock options, vesting of restricted shares, vesting of restricted stock units, and vesting of LTIP awards that have met the performance criteria, utilizing the treasury stock method.