Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Nonvested Restricted Stock, Stock Grants and Stock Units

The following table is a summary of awards granted and the weighted-average grant date fair value for the three years ended 2018, 2017 and 2016:

	Restricted Stock Units, Stock Grants, and Stock Units (a)						Performance Shares (b)
	2018		2017		2016		2018		2017		2016
Units granted	132,997		161,963		141,811		171,708		147,706		166,666
Weighted-average grant date fair value	$	77.51	$	72.60	$	67.34	$	76.56	$	78.99	$	66.60

(a) Units granted includes awards that will be cash settled of 66,252 in 2018, 67,599 in 2017, and 43,952 in 2016.

(b)

Reflects the target payout level.The following table is a summary of the status of non-vested awards as of December 31, 2018 and changes during the year:

	Restricted Stock Units, Stock Grants, and Stock Units					Performance Shares
	Shares			Weighted-Average Grant Date Fair Value		Shares (b)		Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2018	291,288			$	69.78	309,502		$	72.46
Granted	132,997			77.51		171,708		76.56
Vested	(147,938	)		67.12		(159,284	)	66.61
Forfeited (c)	(5,356	)		73.42		(9,542	)	73.34
Nonvested at December 31, 2018	270,991		(a)	74.39		312,384		77.67
Vested Awards Outstanding at December 31, 2018	73,144					159,284

 

(a) Includes 148,131 of awards that will be cash settled.

(b) The nonvested performance shares are reflected at target payout level. 

(c) We account for forfeitures as they occur.

Summary of Nonvested Performance Shares

The following table is a summary of awards granted and the weighted-average grant date fair value for the three years ended 2018, 2017 and 2016:

	Restricted Stock Units, Stock Grants, and Stock Units (a)						Performance Shares (b)
	2018		2017		2016		2018		2017		2016
Units granted	132,997		161,963		141,811		171,708		147,706		166,666
Weighted-average grant date fair value	$	77.51	$	72.60	$	67.34	$	76.56	$	78.99	$	66.60

(a) Units granted includes awards that will be cash settled of 66,252 in 2018, 67,599 in 2017, and 43,952 in 2016.

(b)

Reflects the target payout level.The following table is a summary of the status of non-vested awards as of December 31, 2018 and changes during the year:

	Restricted Stock Units, Stock Grants, and Stock Units					Performance Shares
	Shares			Weighted-Average Grant Date Fair Value		Shares (b)		Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2018	291,288			$	69.78	309,502		$	72.46
Granted	132,997			77.51		171,708		76.56
Vested	(147,938	)		67.12		(159,284	)	66.61
Forfeited (c)	(5,356	)		73.42		(9,542	)	73.34
Nonvested at December 31, 2018	270,991		(a)	74.39		312,384		77.67
Vested Awards Outstanding at December 31, 2018	73,144					159,284

 

(a) Includes 148,131 of awards that will be cash settled.

(b) The nonvested performance shares are reflected at target payout level. 

(c) We account for forfeitures as they occur.