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Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

The weighted-average fair value of options granted and the weighted-average assumptions used in the Black-Scholes-Merton option pricing model for such grants were as follows:



	2019			2018			2017
Dividend Yield	0.3		%	0.3		%	0.4		%
Expected Volatility	36.5		%	34.8		%	32.8		%
Risk-free Interest Rate	2.5		%	2.6		%	1.9		%
Expected Term (in years)	5.3			5.3			5.3
Weighted-average Fair Value of Stock Options Granted	$	19.59		$	16.54		$	8.55

Summary Information about Stock Options Outstanding

The following table summarizes information about stock options outstanding at December 31, 2019:



	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number Outstanding December 31, 2019	Weighted Average Remaining Contractual Life (in Years)	Weighted Average Exercise Price		Number Exercisable December 31, 2019	Weighted Average Exercise Price
$19.92-20.00	11,250	0.15	$	19.92	11,250	$	19.92
20.01-30.00	1,006,783	6.23	25.51		851,403	25.21
30.01-40.00	97,301	5.01	32.16		97,301	32.16
40.01-50.00	330,890	8.04	47.26		103,430	47.26
50.01-54.18	283,590	9.02	54.18		—	—
19.92-54.18	1,729,814	6.93	34.71		1,063,384	27.93

Summary of Stock Option Activity

The table below summarizes option activity for the year ended December 31, 2019:



	Options (In Thousands)		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in Years)	Aggregate Intrinsic Value (in Thousands)		Weighted Average Fair Value
Outstanding at January 1, 2019	1,677		$	30.42
Granted	293		54.18
Exercised	(217	)	26.76
Forfeited/expired	(23	)	44.69
Outstanding at December 31, 2019	1,730		34.71		6.93	$	38,754	$	11.67
Expected to Vest	654		45.36		8.29	7,687		15.91
Exercisable at December 31, 2019	1,063		27.93		6.10	31,028		8.97

Summary of Restricted Stock Activity

The following table summarizes information about restricted stock activity during 2019:



	Restricted Stock (In Thousands)		Weighted Average Fair Value
Non-vested at January 1, 2019	589		$	34.18
Granted	225		54.28
Vested	(280	)	30.96
Forfeited/unearned	(40	)	44.45
Non-vested at December 31, 2019	494		44.33

Summary of Performance Share Units

The following table summarizes information about performance share unit activity during 2019:



	Performance Share Units (In Thousands)		Weighted Average Fair Value
Non-vested at January 1, 2019	799		$	33.11
Granted	248		54.27
Vested	(425	)	29.89
Forfeited/unearned	(40	)	41.27
Non-vested at December 31, 2019	582		43.93