Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 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	(23,573)		33.45
Forfeited	(1,025)		35.20
Outstanding at June 30	286,489		41.54	4.76	$	7,597
Exercisable at June 30	225,712		36.18	3.71	$	7,194
Weighted-average fair value of options granted during the year	$ 25.19

Schedule of weighted-average assumptions used in valuing options

	Six months ended June 30,
	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 six months ended June 30,2016 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	40,256		67.06
Vested	(63,100)		36.97
Forfeited	(700)		47.18
Nonvested at June 30, 2016	194,738		51.74

Summary of nonvested RSUs

Nonvested RSUs for the six months endedJune 30,  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	68,842		65.23
Nonvested at June 30, 2016	148,631		64.93