Stock Purchase Plans (Tables)

12 Months Ended

Dec. 31, 2016

Stock Purchase Plans [Abstract]

Schedule Of Share-based Compensation, Stock Options, Activity

(Dollars in thousands except share and per share data)
	ESPP	Weighted Average			Aggregate
	Options	Price Per Share			Intrinsic Value
Balance Outstanding at December 31, 2013	32,279	$	15.24
Granted	27,596		18.91
Exercised	(3,793)		15.55
Expired	(30,112)		15.40
Balance Outstanding at December 31, 2014	25,970	$	18.91
Granted	23,379		23.42
Exercised	(4,794)		19.17
Expired	(22,269)		19.08
Balance Outstanding at December 31, 2015	22,286	$	23.42	$	2
Granted	24,434		22.46
Exercised	(907)		22.66
Expired	(23,060)		23.38
Balance Outstanding at December 31, 2016	22,753	$	22.46	$	140
Shares available for future grants at December 31, 2016	209,988

	ISOP	Weighted Average
	Options	Price Per Share
Balance Outstanding at December 31, 2013	55,825	$	24.21
Granted	-		-
Exercised	-		-
Forfeited	(11,750)		27.67
Balance Outstanding at December 31, 2014	44,075	$	$23.29
Granted	17,500		22.05
Exercised	-		-
Forfeited	(8,500)		25.29
Balance Outstanding at December 31, 2015	53,075	$	$22.56	$	50
Granted	24,450		21.27
Exercised	(3,800)		16.25
Forfeited	(15,000)		24.14
Balance Outstanding at December 31, 2016	58,725	$	$22.03	$	386
Shares available for future grants at December 31, 2016	317,427

Share-based Compensation Arrangement By Share-based Payment Award, Options, Vested And Expected To Vest, Outstanding And Exercisable

	Options				Weighted
	Outstanding	Exercise Price or	Weighted Average		Average Remaining
Stock Option Plan	and Exercisable	Price Range	Exercise Price		Life (years)
Employee Stock Purchase Plan	22,753	$22.46	$	22.46	0.5
Incentive Stock Option Plan	5,500	$16.11	$	16.11	2.2
Incentive Stock Option Plan	37,350	21.27 - 22.05		21.56	8.8
Incentive Stock Option Plan	9,675	23.77		23.77	1.1
Incentive Stock Option Plan	6,200	27.37		27.37	0.1
ISOP Total/Average	58,725		$	22.03	6.0

Valuation Assumptions Using Black-Scholes Method

	2016		2015		2014
Incentive Stock Option Plan
Options granted		24,450		17,500		-
Risk-free interest rate		1.22%		1.47%		-
Expected volatility of the Corporation's stock		25.76%		28.64%		-
Expected dividend yield		3.23%		3.09%		-
Expected life (in years)		5.25		5.25		-
Weighted average fair value of options granted	$	3.58	$	4.22	$	-
(Dollars in thousands)
Compensation expense included in net income
ESPP	$	-	$	-	$	-
ISOP		88		74		-
Total compensation expense included in net income	$	88	$	74	$	-