Stock Plans and Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of stock options and stock appreciation rights

The following table presents the activity related to stock options and SARs under all plans for the year ended December 31, 2020.  

	Number of Shares/Rights	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2020	157,622	$	49.72
Granted	0	0.00
Exercised	(13,235)	39.98
Forfeited	0	0.00
Outstanding at December 31, 2020	144,387	$	50.61	3.48	$	2,991,656
Exercisable at December 31, 2020	118,697	$	49.17	3.23	$	2,622,344

Schedule of intrinsic value of options, SARs, and restricted stock

Net cash proceeds, tax benefits and intrinsic value related to total stock options, SARs, and restricted stock exercised is as follows: 

(in thousands)	2020		2019		2018
Proceeds from stock option exercises	$	(253)	$	(992)	$	(540)
Tax benefits related to stock option exercises	156		944		680
Intrinsic value of stock option exercises	570		2,460		1,447

Schedule of total stock options exercised

Net cash proceeds, tax benefits and intrinsic value related to total stock options, SARs, and restricted stock exercised is as follows: 

(in thousands)	2020		2019		2018
Proceeds from stock option exercises	$	(253)	$	(992)	$	(540)
Tax benefits related to stock option exercises	156		944		680
Intrinsic value of stock option exercises	570		2,460		1,447

Schedule of options outstanding

December 31, 2020
Options and SARs Outstanding			Options and SARs Exercisable
Range of Exercise Prices	Number Outstanding	Weighted Average Remaining Contractual Life	Weighted Average Exercise Price		Number Exercisable	Weighted Average Exercise Price
$35.71-37.50	22,872	0.63	$	37.00	22,872	$	37.00
$37.51-41.00	24,711	2.28	$	40.60	24,711	$	40.60
$41.01-50.00	46,886	3.80	$	49.22	38,066	$	49.22
$50.01-76.90	49,696	5.07	$	63.01	32,881	$	63.82
$76.91-86.18	222	5.89	$	86.18	167	$	86.18
	144,387	3.48	$	50.61	118,697	$	49.17

Schedule of restricted stock awards

The following table presents activity related to restricted stock awards and restricted stock units for the year ended December 31, 2020. 

	Number of Shares	Weighted Average Grant Date Fair Value
Unvested at January 1, 2020	247,967	$	73.66
Granted	86,411	63.44
Vested	(73,272)	64.06
Forfeited	(6,117)	75.98
Unvested at December 31, 2020	254,989	$	70.55