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Note 11 - Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Years Ended December 31,

 
  

2021

  

2020

  

2019

 

Stock options and SARs

 $1,420  $1,321  $407 

Restricted stock

  2,241   777   835 

Performance shares

  349   432   243 

Total share-based compensation expense

 $4,010  $2,530  $1,485 
             

Related income tax benefit

 $760  $286  $262 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
  

Years Ended December 31,

 
  

2021

  

2020

  

2019

 

Stock Options:

            

Risk free interest rate

  0.2% - 1.6%   0.1% - 1.4%   1.7% - 2.5% 

Expected award life (years)

  3-10   3-10   3-10 

Expected volatility

  46.9% - 65.0%   35.6% - 61.5%   34.2% - 38.8% 

Expected dividend yield

  1.6% - 2.2%   1.9% - 5.3%   2.3% - 2.5% 

Weighted average fair value per share at grant date

 $9.91  $2.36  $3.96 
             

SARs:

            

Risk free interest rate

  0.2%  0.2% - 1.4%   2.4%

Expected award life (years)

  3   3   3 

Expected volatility

  64.3%  35.6% - 55.8%   34.8%

Expected dividend yield

  1.6%  3.6% - 5.3%   2.3%

Weighted average fair value per share at grant date

 $10.09  $2.18  $3.97 
Share-based Payment Arrangement, Option, Activity [Table Text Block]
                
           Weighted Average   Aggregate 
   No. of   Weighted Average   Remaining Life   Intrinsic Value 
   Shares   Exercise Price   (in years)   (in thousands) 

Outstanding, January 1, 2021

  970,022  $12.92   3.74  $11,128 

Granted

  143,712   25.00         

Exercised

  (305,018)  10.27         

Lapsed or cancelled

 (28,778)   14.74         

Outstanding, December 31, 2021

  779,938   16.12   3.27   5,097 

Exercisable, December 31, 2021

  438,705   15.03   2.68   3,153 
Share-based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block]
                
           Weighted Average   Aggregate 
   No. of   Weighted Average   Remaining Life   Intrinsic Value 
   Shares   Exercise Price   (in years)   (in thousands) 

Outstanding, January 1, 2021

  317,128  $13.47   3.36  $2,031 

Granted

  31,687   25.75         

Exercised

  (57,756)  12.54         

Outstanding, December 31, 2021

  291,059   14.99   2.65   2,205 

Exercisable, December 31, 2021

  129,268   16.40   1.83   777 
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
      Weighted Average 
  

No. of

  

Grant Date

 
  

Shares

  

Fair Value

 

Outstanding, January 1, 2021

  157,244  $16.84 

Granted

  345,015   20.99 

Vested

  (37,930)  21.61 

Forfeited

  (6,163)  21.64 

Outstanding, December 31, 2021

  458,166   19.51 
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
      Weighted Average 
  

No. of

  

Grant Date

 
  

Shares

  

Fair Value

 

Outstanding, January 1, 2021

  186,264  $18.28 

Granted

  116,405   22.13 

Vested

  (57,255)  17.54 

Forfeited

  (51,891)  15.73 

Outstanding, December 31, 2021

  193,523   21.50