Stock Based Compensation (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding stock options, number (in shares)	136,470		136,470
Outstanding stock option, weighted average exercise price (in dollars per share)	$ 12.54		$ 12.54
Outstanding stock option, weighted average remaining contractual life			5 years 7 months 6 days
Exercisable stock options, number (in shares)	81,193		81,193
Exercisable stock option, weighted average exercise price (in dollars per shares)	$ 13.25		$ 13.25
Exercisable stock options, weighted average remaining contractual life			3 years 10 months 24 days
Options, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares)			124,123	99,040
Granted (in shares)			14,491	25,083
Exercised (in shares)			(2,144)	0
Outstanding at end of period (in shares)	136,470	124,123	136,470	124,123
Exercisable at end of period (in shares)	81,193	57,746	81,193	57,746
Weighted average exercise price [Roll forward]
Outstanding at beginning of period (in dollars per share)			$ 12.54	$ 12.71
Granted (in dollars per shares)			$ 12.60	$ 11.85
Exercised (in dollars per share)			$ 13.09	$ 0
Outstanding at end of period (in dollars per share)	$ 12.54	$ 12.54	$ 12.54	$ 12.54
Exercisable at end of period (in dollars per share)	$ 13.25	$ 14.06	$ 13.25	$ 14.06
Aggregate intrinsic value for option outstanding	$ 225,000	$ 95,000	$ 225,000	$ 95,000
Aggregate intrinsic value of options exercisable	123,000	36,000	123,000	36,000
Fair Value Assumptions and Methodology [Abstract]
Estimated weighted-average fair value of options granted (in dollars per share)			$ 2.80	$ 2.09
Risk-free interest rate (in hundredths)			0.84%	2.84%
Average dividend (in dollars per share)			0.64	0.64
Volatility factor of the expected market price of the company's common stock (in hundredths)			39.56%	27.37%
Average life in years (in years)			6 years 6 months	6 years 6 months
Total expense related to options included in salaries and wages	$ 11,000	$ 11,000	$ 20,000	$ 22,000
Exercise Price Range A [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)			$ 9.00
Exercise price range, upper range limit (in dollars per share)			$ 10.99
Outstanding stock options, number (in shares)	29,110		29,110
Outstanding stock option, weighted average exercise price (in dollars per share)	$ 9.00		$ 9.00
Outstanding stock option, weighted average remaining contractual life			5 years 9 months 18 days
Exercisable stock options, number (in shares)	18,964		18,964
Exercisable stock option, weighted average exercise price (in dollars per shares)	$ 9.00		$ 9.00
Exercisable stock options, weighted average remaining contractual life			5 years 3 months 18 days
Exercise Price Range B [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)			$ 11.00
Exercise price range, upper range limit (in dollars per share)			$ 12.99
Outstanding stock options, number (in shares)	74,290		74,290
Outstanding stock option, weighted average exercise price (in dollars per share)	$ 12.03		$ 12.03
Outstanding stock option, weighted average remaining contractual life			7 years 2 months 12 days
Exercisable stock options, number (in shares)	29,159		29,159
Exercisable stock option, weighted average exercise price (in dollars per shares)	$ 12.01		$ 12.01
Exercisable stock options, weighted average remaining contractual life			5 years
Exercise Price Range C [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)			$ 13.00
Exercise price range, upper range limit (in dollars per share)			$ 14.99
Outstanding stock options, number (in shares)	8,912		8,912
Outstanding stock option, weighted average exercise price (in dollars per share)	$ 13.09		$ 13.09
Outstanding stock option, weighted average remaining contractual life			6 months
Exercisable stock options, number (in shares)	8,912		8,912
Exercisable stock option, weighted average exercise price (in dollars per shares)	$ 13.09		$ 13.09
Exercisable stock options, weighted average remaining contractual life			6 months
Exercise Price Range D [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)			$ 17.00
Exercise price range, upper range limit (in dollars per share)			$ 18.99
Outstanding stock options, number (in shares)	24,158		24,158
Outstanding stock option, weighted average exercise price (in dollars per share)	$ 18.16		$ 18.16
Outstanding stock option, weighted average remaining contractual life			2 years 8 months 12 days
Exercisable stock options, number (in shares)	24,158		24,158
Exercisable stock option, weighted average exercise price (in dollars per shares)	$ 18.16		$ 18.16
Exercisable stock options, weighted average remaining contractual life			2 years 8 months 12 days
Ownership Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance (in shares)	200,000		200,000
Period options granted to date vest ratably			5 years
Period options granted expires after date of grant			10 years