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Stock Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Weighted Average Assumptions

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions used:

Grant Year		Dividend Yield			Expected Volatility			Risk Free Interest Rate			Expected Lives
2020		5%			45%			2%				6
2019		5%			46%			2%				6
2018		5%			46%			2%				6

Stock Option Transactions under Various Stock-Based Employee Compensation Plans

Information regarding the 1996 Plan for the year ended December 31, 2020 is as follows:

		Shares				Weighted Average Exercise Price				Weighted Average Contractual Life
Outstanding, beginning of year			608,375			$	57.97
Granted			63,500				71.91
Exercised			(61,949	)			50.66
Forfeited			—				—
Expired			(11,000	)			50.81
Outstanding, end of year			598,926				60.34				5.42
Exercisable at end of year			422,626				55.06				4.25

Summary of ESPP Share Activity

The following is a summary of 2019 ESPP share activity for the year ended December 31, 2020:

		Shares
Available for future purchases, January 1, 2020			438,434
Additional shares reserved under 2019 ESPP			86,093
Purchases			(154,756	)
Available for future purchases, December 31, 2020			369,771

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Share based compensation arrangement by share based payment award fair value assumptions and methodology.

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Tabular disclosure of employee stock purchase plan activity.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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