Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Stock Based Compensation [Abstract]

Schedule of Share based Payment Award Restricted Stock Valuation Assumptions

The following is a summary of the key assumptions used in the valuation calculations for market based awards granted during the years ended December 31, 2021, 2020 and 2019:

	2021	2020	2019
Risk free rate	0.161%	1.603%	2.578%
Dividend yield	3.341%	3.070%	4.043%
Volatility	28.04%	17.02%	18.95%
Requisite service period	3 years	3 years	3 years

Nonvested Restricted Stock Shares Activity

A summary of the status of the nonvested restricted shares as of December 31, 2021, and the changes for the year ended December 31, 2021, is presented below:

Nonvested Shares	Shares			Weighted Average Grant-Date Fair Value
Nonvested as of January 1, 2021		216,850		$	102.10
Issued		143,375			87.05
Vested		(197,970	)		80.06
Forfeited		(359	)		110.23
Nonvested as of December 31, 2021		161,896		$	115.07

Share-based Compensation, Stock Options, Activity

A summary of the status of the outstanding stock options as of December 31, 2021 and the changes for the year ended December 31, 2021 is presented below:

Stock Options	Options			Weighted Average Exercise Price
Outstanding as of January 1, 2021		19,845		$	77.83
Exercised		(19,032	)		77.67
Outstanding as of December 31, 2021		813		$	81.41