Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payments - Stock Option Activity (Details)

v3.20.2
Share-Based Payments - Stock Option Activity (Details)
$ / shares in Units, $ in Thousands
 9 Months Ended
Sep. 30, 2020
USD ($)
$ / shares
shares
Sep. 30, 2019
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 7,852 $ 8,536
Share-based Payment Arrangement, Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option grants expire (in years) 7 years  
Grants, vesting period (in years) 3 years  
Continuing Operations [Member] | Share-based Payment Arrangement, Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected dividend yield (in hundredths) 1.10%  
Expected stock price volatility 24.10%  
Weighted Average Risk Free Interest Rate 1.50%  
Expected life of options (in years) 5 years 10 months 24 days  
Weighted-average fair value of options (dollars per share) | $ / shares $ 15  
Outstanding, beginning of period (in shares) | shares 417,000  
Granted (in shares) | shares 36,000  
Exercised (in shares) | shares (42,000)  
Forfeited (in shares) | shares (4,000)  
Outstanding, end of period (in shares) | shares 407,000  
Exercisable, end of period (in shares) | shares 311,000  
Outstanding, beginning of period (in dollars per share) | $ / shares $ 53  
Grants in Period (in dollars per share) | $ / shares 66  
Exercises in Period (in dollars per share) | $ / shares 46  
Forfeited in period (in dollars per share) | $ / shares 60  
Outstanding, end of period (in dollars per share) | $ / shares 55  
Exercisable, end of period (in dollars per share) | $ / shares $ 53  
Aggregate Intrinsic Value Outstanding, end of period $ (133)  
Aggregate Intrinsic Value Exercisable, end of period $ 682  
Weighted-average remaining contractual term Outstanding, end of period (in years) 3 years 9 months 18 days  
Weighted-average remaining contractual term Exercisable, end of period (in years) 3 years 4 months 24 days  
Share-based compensation expense $ 869 1,178
Tax benefit related to share-based expense 225 304
Unrecognized share-based compensation, net of estimated forfeitures $ 1,065 1,846
Weighted average period over which unrecognized compensation will be recognized (years) 1 year 4 months 24 days  
Discontinued Operations [Member] | Share-based Payment Arrangement, Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding, beginning of period (in shares) | shares 14,000  
Outstanding, end of period (in shares) | shares 14,000  
Exercisable, end of period (in shares) | shares 12,000  
Outstanding, beginning of period (in dollars per share) | $ / shares $ 52  
Outstanding, end of period (in dollars per share) | $ / shares 52  
Exercisable, end of period (in dollars per share) | $ / shares $ 52  
Aggregate Intrinsic Value Outstanding, end of period $ 37  
Aggregate Intrinsic Value Exercisable, end of period $ 41  
Weighted-average remaining contractual term Outstanding, end of period (in years) 3 years  
Weighted-average remaining contractual term Exercisable, end of period (in years) 2 years 10 months 24 days  
Share-based compensation expense $ 16 31
Tax benefit related to share-based expense 4 8
Unrecognized share-based compensation, net of estimated forfeitures $ 6 $ 32
Weighted average period over which unrecognized compensation will be recognized (years) 4 months 24 days