Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Fair Value Assumptions

The following table summarizes the assumptions we used:

	For the Years Ended December 31,
	2019	2018	2017
Risk-free rate of return	1.66% to 2.23%	2.61% to 2.96%	1.83% to 2.22%
Expected dividend yields	1.76% to 1.83%	1.71% to 1.87%	1.63% to 1.72%
Expected award life (years)	4.49 to 4.50	4.48 to 4.49	4.48 to 4.49
Expected volatility	18.18% to 19.15%	17.82% to 18.44%	18.13% to 18.70%

Summary of Restricted Share Activity

A summary of restricted share activity as of December 31, 2019 and changes during the year then ended is as follows:

	Shares		Weighted-Average Grant Date Fair Value
Outstanding at January 1, 2019	897,005		$	46.82
Granted	219,202		$	68.50
Vested and issued	(486,239	)	$	40.32
Expired or forfeited	(158,697	)	$	57.96
Outstanding at December 31, 2019	471,271		$	60.09

Summary of Stock-Settled SARs Activity

A summary of stock-settled SARs activity as of December 31, 2019 and changes during the year then ended is as follows:

	Shares		Weighted-Average Exercise Price
Outstanding at January 1, 2019	810,759		$	33.89
Exercised	(178,224	)	$	34.74
Expired or forfeited	(7,167	)	$	37.85
Outstanding at December 31, 2019	625,368		$	33.60

Summary of Cash-Settled SARs Activity

was 1.43 years.

A summary of cash-settled SARs activity as of December 31, 2019 and changes during the year then ended is as follows:

	Shares		Weighted-Average Exercise Price
Outstanding at January 1, 2019	58,428		$	30.71
Exercised	(52,298	)	$	30.39
Expired or forfeited	(1,193	)	$	19.37
Outstanding at December 31, 2019	4,937		$	36.80