Stock Based Compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount of accrued share base compensation reversed	$ 140,000	$ 136,000	$ 247,000
Options, number of shares outstanding [Roll Forward]
Granted (in shares)	0	0	0
Non-vested equity instruments other than option, weighted average fair value [Roll Forward]
Stock rights fortified due to non achievement of goals (in shares)	9,784
Unrecognized compensation cost, decreased	288,000
Non employee Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	68,000	68,000
Stock Options [Member]
Options, number of shares outstanding [Roll Forward]
Outstanding, beginning of period (in shares)	23,732	42,266	62,480
Granted (in shares)	0	0	0
Exercised (in shares)	0	(18,534)	(20,214)
Expired (in shares)	(23,732)	0	0
Forfeited (in shares)	0	0	0
Outstanding, end of period (in shares)	0	23,732	42,266
Options, weighted average exercise price [Roll Forward]
Outstanding, beginning of period (in dollars per share)	$ 13.00	$ 10.84	$ 9.96
Exercised (in dollars per share)		$ 8.07	$ 8.12
Outstanding, end of period (in dollars per share)		$ 13.00	$ 10.84
Average intrinsic value (in dollars per share)	0
Weighted-average fair value option of options granted during the period (in shares)	$ 0	$ 0	$ 0
Unvested Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Compensation expense	139,000	137,000
Non-vested equity instruments other than options, shares [Roll Forward]
Nonvested at beginning of period (in shares)	32,572	33,772	47,282
Granted (in shares)	17,557	14,466	15,337
Vested (in shares)	(18,706)	(15,666)	(28,847)
Forfeited (in shares)	0	0	0
Nonvested at end of period (in shares)	31,423	32,572	33,772
Non-vested equity instruments other than option, weighted average fair value [Roll Forward]
Granted (in dollars per share)	$ 12.08	$ 14.30	$ 13.78
Total unrecognized compensation cost	158,000
Recognition period for total unrecognized compensation costs	3 years
Unvested Restricted Shares [Member] | Executive Officer [Member]
Non-vested equity instruments other than options, shares [Roll Forward]
Granted (in shares)	11,925	9,714	9,784
Vested Restricted Stock [Member] | Non employee Director [Member]
Non-vested equity instruments other than options, shares [Roll Forward]
Granted (in shares)	5,632	4,752	5,553
Performance based stock rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Accrued compensation expense eliminated	169,000
Amount of accrued share base compensation reversed	51,000
Compensation expense	(118,000)	116,000	106,000
Non-vested equity instruments other than options, shares [Roll Forward]
Nonvested at beginning of period (in shares)	32,572	22,858	13,074
Granted (in shares)	11,925	9,714	9,784
Vested (in shares)	(13,074)	0	0
Forfeited (in shares)	0	0	0
Nonvested at end of period (in shares)	31,423	32,572	22,858
Non-vested equity instruments other than option, weighted average fair value [Roll Forward]
Nonvested at end of period (in dollars per share)	$ 13.30	$ 12.44	$ 11.65
Total unrecognized compensation cost	$ 418,000
Recognition period for total unrecognized compensation costs	3 years
Performance based stock rights [Member] | Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights	The award for 2010 was subject to the Company reaching a predetermined return on average equity ratio for the final year of the vesting period as compared to a predetermined peer group of banks.
Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	350,000
Stock Incentive Plan [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of options as percentage of market price (in hundredths)	100.00%
Award vesting period	3 years
Award term	10 years
Stock Incentive Plan [Member] | Performance based stock rights [Member]
Non-vested equity instruments other than options, shares [Roll Forward]
Granted (in shares)	11,925	9,714	9,784