Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2016

Share-Based Compensation

Schedule of stock option activity

		Weighted		Weighted
		Average		Average	Aggregate
	Number of	Exercise		Remaining	Intrinsic
	Shares	Price		Contractual Life (Yrs.)	Value(000's)
Outstanding at  January 1	285,405	$	38.85
Granted	25,682		63.79
Exercised	(18,348)		33.50
Outstanding at March 31	292,739		41.37	4.90	$	6,739
Exercisable at March 31	231,962		36.11	3.86	$	6,545
Weighted-average fair value of options granted during the year	$ 25.19

Schedule of weighted-average assumptions used in valuing options

	Three months ended  March 31,
	2016		2015
Dividend yield	1.60	%	1.40	%
Expected life	8.5	years	8.5	years
Expected volatility	40.6	%	40.9	%
Risk-free interest rate	1.90	%	1.79	%

Summary of nonvested restricted stock

Nonvested restricted stock for the three months ended March 31,2016 is summarized in the following table.  All information has been retroactively adjusted for stock dividends and stock splits.

		Weighted-
		Average
		Grant-Date
Restricted Stock	Shares	Fair Value
Nonvested at January 1 2016	218,282	$	44.56
Granted	29,558		65.91
Vested	(50,490)		36.62
Forfeited	(700)		47.18
Nonvested at March 31, 2016	196,650		49.80

Summary of nonvested RSUs

Nonvested RSUs for the three months endedMarch 31,  2016 is summarized in the following table.

		Weighted-
		Average
		Grant-Date
Restricted Stock Units	Shares	Fair Value
Nonvested at January 1, 2016	79,789	$	64.66
Granted	44,599		65.86
Nonvested at March 31, 2016	124,388		65.09