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Note 17 - Stock-based Compensation (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Share-based Compensation Arrangement by Share-based Payment Award Fair Value Assumptions and Methodology [Table Text Block]

Assumptions

 

2021

  

2020

 

Dividend yield

  2.52%  2.51%

Expected volatility

  25.19%  20.87%

Risk free interest rate

  1.22%  1.25%

Expected life (in years)

  7.1   7.1 
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Three months ended September 30, 2021

 

(in thousands)

 

Stock

Appreciation

Rights

  

Restricted

Stock Awards

  

Restricted

Stock Units

  

Performance

Stock Units

  

Total

 
                     

Expense

 $88  $312  $79  $686  $1,165 

Deferred tax benefit

  (18)  (66)  (17)  (144)  (245)

Total net expense

 $70  $246  $62  $542  $920 
  

Three months ended September 30, 2020

 

(in thousands)

 

Stock

Appreciation

Rights

  

Restricted

Stock Awards

  

Restricted

Stock Units

  

Performance

Stock Units

  

Total

 
                     

Expense

 $88  $424  $67  $264  $843 

Deferred tax benefit

  (19)  (90)  (14)  (56)  (179)

Total net expense

 $69  $334  $53  $208  $664 
  

Nine months ended September 30, 2021

 

(in thousands)

 

Stock

Appreciation

Rights

  

Restricted

Stock Awards

  

Restricted

Stock Units

  

Performance

Stock Units

  

Total

 
                     

Expense

 $264  $978  $233  $1,953  $3,428 

Deferred tax benefit

  (55)  (206)  (49)  (411)  (721)

Total net expense

 $209  $772  $184  $1,542  $2,707 
  

Nine months ended September 30, 2020

 

(in thousands)

 

Stock

Appreciation

Rights

  

Restricted

Stock Awards

  

Restricted

Stock Units

  

Performance

Stock Units

  

Total

 
                     

Expense

 $265  $1,064  $202  $1,105  $2,636 

Deferred tax benefit

  (56)  (223)  (42)  (231)  (552)

Total net expense

 $209  $841  $160  $874  $2,084 
Share-based Payment Arrangement, Nonvested Award, Cost [Table Text Block]
  

Stock

                 

(in thousands)

 

Appreciation

  

Restricted

  

Restricted

  

Performance

     

Year ended

 

Rights

  

Stock Awards

  

Stock Units

  

Stock Units

  

Total

 
                     

Remainder of 2021

 $88  $314  $79  $659  $1,140 

2022

  309   1,074   3   1,506   2,892 

2023

  234   869      700   1,803 

2024

  127   628         755 

2025

  68   376         444 

2026

  11   34         45 

Total estimated expense

 $837  $3,295  $82  $2,865  $7,079 
Share-based Payment Arrangement, Option and Stock Appreciation Rights, Activity [Table Text Block]
                     

Weighted

 
         

Weighted

      

Weighted

  

average

 
         

average

  

Aggregate

  

average

  

remaining

 
     

Exercise

  

exercise

  

intrinsic

  

fair

  

contractual

 

(in thousands, except per share data)

 

SARs

 

price

  

price

  

value(1)

  

value

  

life (in years)

 
                        

Outstanding, January 1, 2020

  641 

$14.02

-$40.00  $25.06  $10,250  $4.10   5.3 

Granted

  48 37.30-37.30   37.30   154   5.80     

Exercised

  (96)14.02-25.76   16.33   2,401   2.88     

Forfeited

                   

Outstanding, December 31, 2020

  593 

$15.24

-$40.00  $27.47  $7,706  $4.44   5.1 
                        

Outstanding, January 1, 2021

  593 

$15.24

-$40.00  $27.47  $7,706  $4.44   5.1 

Granted

  31 47.17-50.71   50.48   251   9.69     

Exercised

  (77)15.24-15.84   15.31   2,815   2.58     

Forfeited

                   

Outstanding, September 30, 2021

  547 

$15.24

-$50.71  $30.46  $15,417  $5.00   5.2 
                        

Vested and exercisable

  388 

$15.24

-$40.00  $26.49  $12,492  $4.30   4.1 

Unvested

  159 33.08-50.71   40.20   2,926   6.70   7.8 

Outstanding, September 30, 2021

  547 

$15.24

-$50.71  $30.46  $15,417  $5.00   5.2 
                        

Vested in the current year

  53 

$25.76

-$40.00  $34.00  $1,316  $5.40     
Schedule of Nonvested Share Activity [Table Text Block]
      

Grant date

 
      

weighted

 

(in thousands, except per share data)

 

RSAs

  

average cost

 
         

Unvested at January 1, 2020

  108  $34.31 

Shares awarded

  36   39.30 

Restrictions lapsed and shares released

  (41)  32.38 

Shares forfeited

  (4)  36.63 

Unvested at December 31, 2020

  99  $36.85 
         

Unvested at January 1, 2021

  99  $36.85 

Shares awarded

  39   46.90 

Restrictions lapsed and shares released

  (34)  35.50 

Shares forfeited

  (5)  40.61 

Unvested at September 30, 2021

  99  $41.05 
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
  

Vesting

      

Expected

 

Grant

 

period

  

Fair

  

shares to

 

year

 

in years

  

value

  

be awarded

 

2019

  3  $32.03   62,291 

2020

  3   32.27   65,111 

2021

  3   44.44   47,280