Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity, Stock Incentive Plan and Net Income per Share - Employee Activity Non-vested Shares (Details)

v3.20.4
Shareholders' Equity, Stock Incentive Plan and Net Income per Share - Employee Activity Non-vested Shares (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation $ 11,033 $ 11,715 $ 10,191
Employee Non-vested Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based awards, vesting period 3 years    
Employee Non-vested Shares [Member] | Continuing Operations      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding at beginning of year (shares) 264 302 216
Granted (shares) 116 112 192
Vested (shares) (150) (126) (102)
Forfeited (shares) (17) (24) (4)
Outstanding at end of year (shares) 213 264 302
Weighted average grant date fair value of non-vested shares at beginning of year $ 58.34 $ 54.92 $ 46.73
Weighted Average Grant Date Fair Value 65.88 59.49 59.88
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value 57.40 51.50 47.04
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value 62.39 56.69 52.01
Weighted average grant date fair value non-vested shares at end of year $ 62.78 $ 58.34 $ 54.92
Grant date fair value of shares that vested during the year $ 9,180 $ 7,684 $ 5,758
Share-based compensation 7,310 7,936 6,633
Tax benefit related to share-based compensation expense 1,747 $ 1,951 $ 1,660
Unrecognized compensation cost $ 7,767    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 8 months 12 days    
Employee Non-vested Shares [Member] | Discontinued Operations      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding at beginning of year (shares) 13 13 11
Granted (shares) 6 5 10
Vested (shares) (10) (5) (5)
Forfeited (shares) (1) 0 (3)
Outstanding at end of year (shares) 8 13 13
Weighted average grant date fair value of non-vested shares at beginning of year $ 54.93 $ 55.16 $ 46.71
Weighted Average Grant Date Fair Value 63.24 59.07 59.46
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value 58.43 48.85 47.00
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value 63.49 0 51.68
Weighted average grant date fair value non-vested shares at end of year $ 60.83 $ 54.93 $ 55.16
Grant date fair value of shares that vested during the year $ 625 $ 270 $ 282
Share-based compensation 71 65 241
Tax benefit related to share-based compensation expense 71 $ 66 $ 72
Unrecognized compensation cost $ 270    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 9 months 18 days