Stock Option Plans (Tables)

12 Months Ended

Dec. 31, 2015

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

Stock Option Activity

	2015			2014
Options outstanding  at the
beginning of the year		1,357,813			1,236,063
Options granted		47,000			214,500
Options forfeited		(39,375	)		(2,500	)
Options exercised		(97,636	)		(90,250	)
Options outstanding at
the end of the year		1,267,802			1,357,813
Options exercisable at the
end of the year		970,017			880,743
Common stock available for future grants at the end of the year		201,350			36,475
Weighted average exercise price per share:
Granted	$	18.90		$	16.68
Forfeited		15.65			14.22
Exercised		12.79			12.62
Outstanding		12.46			12.35
Exercisable		11.72			11.53

Summary of Options Outstanding

		Options Outstanding		Options Exercisable
Range of Exercise Prices	Number Outstanding	Weighted- Average Remaining Contractual Life (Years)	Weighted- Average Exercise Price	Number Exercisable	Weighted- Average Exercise Price
$6.81 to $10.25	463,595	5	$          9.45	448,435	$        9.43
$10.26 to $13.62	291,250	5	11.69	242,250	11.80
$13.63 to $15.33	271,457	5	14.32	195,707	14.51
$15.34 to $19.50	241,500	6	17.09	83,625	17.28
	1,267,802			970,017

Assumptions Used to Value Option Grants

	2015	2014
Expected life in years	5	5
Interest rate	1.33 – 1.62%	1.53 – 1.77%
Volatility	.234-.252	.245-.282
Dividend yield	1.95% - 2.10%	2.0%