Stock Option Plans (Tables)

12 Months Ended

Dec. 31, 2014

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

Stock Option Activity

	2014			2013
Options outstanding at the beginning of the year		1,236,063			1,118,688
Options granted		214,500			220,500
Options forfeited		(2,500	)		(27,475	)
Options exercised		(90,250	)		(75,650	)
Options outstanding at the end of the year		1,357,813			1,236,063
Options exercisable at the end of the year		880,743			771,208
Common stock available for future grants at the end of the year		36,475			38,975
Weighted average exercise price per share:
Granted	$	16.68		$	13.38
Forfeited		14.22			12.17
Exercised		12.62			6.89
Outstanding		12.35			11.61
Exercisable		11.53			11.64

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		500,188	6	$	9.44	430,243	$	9.37
$10.26 to $13.62		302,875	6		11.70	211,625		11.97
$13.63 to $15.33		309,750	5		14.38	188,375		14.72
$15.34 to $17.03		245,000	8		16.56	50,500		16.14
		1,357,813				880,743

Assumptions Used to Value Option Grants

	2014	2013
Expected life in years	5	5
Interest rate	1.53 – 1.77%	0.70 – 1.45%
Volatility	.245-.282	.317-.328
Dividend yield	2.0%	2.10% - 2.70%