Stock-Based Compensation and Directors Stock Purchase Plan (Tables)

12 Months Ended

Dec. 31, 2018

Summary Of The Status Of Nonvested Share Awards

Nonvested Restricted Stock Awards

Nonvested stock is awarded to key employees by action of the Company's Compensation and Human Resources Committee and Board of Directors. These awards generally vest after 4 to 7 years of continued employment, but vesting terms may vary according to the specifics of the individual grant agreement. There are restrictions as to transferability, sale, pledging, or assigning, among others, prior to the end of the vesting period. Dividend and voting rights are conferred upon grant of restricted stock awards. A summary of the status of the Company’s nonvested share awards as of December 31, 2018 and changes during the year then ended is presented below.



	Shares		Weighted Average Grant Date Fair Value
Nonvested at January 1, 2018	1,317,092		$	36.82
Granted	268,658		57.28
Vested	(376,489	)	30.73
Forfeited	(28,321	)	44.12
Canceled	—		—
Nonvested at December 31, 2018	1,180,940		$	43.24

Schedule Of Share Based Payment Award Stock Options Valuation Assumptions [Table Text Block]



	2018			2017			2016
Weighted per share average fair value at grant date		$11.84			$11.37			$6.47
Assumptions:
Dividend yield	1.6		%	1.6		%	2.2		%
Volatility	20.6		%	21.1		%	21.2		%
Risk-free interest rate	2.7		%	2.4		%	1.8		%
Expected term	6.6 years			7.0 years			7.2 years

Summary Of SAR Activity



(Dollars in thousands, except per share data)	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
Outstanding at January 1, 2018	1,237,804		$	35.36
Granted	177,001		55.63
Forfeited	(17,529	)	45.82
Expired	(607	)	43.14
Exercised	(330,231	)	29.96
Outstanding at December 31, 2018	1,066,438		$	40.22	6.7	years	$	17,218
Exercisable at December 31, 2018	561,527		$	34.57	5.6	years	$	12,239

Schedule Of Additional Information About Stock Options and SARs Exercises

Additional information about stock options and SARs exercised is presented below.



(In thousands)	2018		2017		2016
Intrinsic value of options and SARs exercised	$	9,632	$	9,310	$	8,854
Tax benefit realized from options and SARs exercised	$	1,928	$	2,698	$	1,781