Regulatory Matters (Capital Amounts and Ratios) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Actual capital (to risk weighted assets)	$ 158,512	$ 155,088
Actual capital (to risk weighted assets) (ratio)	13.57%	13.30%
Minimum capital (to risk weighted assets)	93,457	93,319
Minimum capital (to risk weighted assets) (ratio)	8.00%	8.00%
Well capitalized (to risk weighted assets)	0	0
Well capitalized (to risk weighted assets) (ratio)	0.00%	0.00%
Actual Tier I Capital (to risk weighted assets)	143,864	140,471
Actual Tier I Capital (to risk weighted assets) (ratio)	12.31%	12.04%
Minimum Tier I Capital (to risk weighted assets)	46,728	46,660
Minimum Tier I Capital (to risk weighted assets) (ratio)	4.00%	4.00%
Well Capitalized Tier I Capital (to risk weighted assets)	0	0
Well Capitalized Tier I Capital (to risk weighted assets) (ratio)	0.00%	0.00%
Actual Tier I Capital (to average assets)	143,864	140,471
Actual Tier I Capital (to average assets) (ratio)	9.20%	8.91%
Minimum Tier I Capital (to average assets)	62,560	63,087
Minimum Tier I Capital (to average assets) (ratio)	4.00%	4.00%
Well Capitalized Tier I Capital (to average assets)	0	0
Well Capitalized Tier I Capital (to average assets) (ratio)	0.00%	0.00%
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Actual capital (to risk weighted assets)	156,161	153,091
Actual capital (to risk weighted assets) (ratio)	13.40%	13.15%
Minimum capital (to risk weighted assets)	93,239	93,168
Minimum capital (to risk weighted assets) (ratio)	8.00%	8.00%
Well capitalized (to risk weighted assets)	116,548	116,459
Well capitalized (to risk weighted assets) (ratio)	10.00%	10.00%
Actual Tier I Capital (to risk weighted assets)	141,547	138,497
Actual Tier I Capital (to risk weighted assets) (ratio)	12.14%	11.89%
Minimum Tier I Capital (to risk weighted assets)	46,619	46,584
Minimum Tier I Capital (to risk weighted assets) (ratio)	4.00%	4.00%
Well Capitalized Tier I Capital (to risk weighted assets)	69,929	69,876
Well Capitalized Tier I Capital (to risk weighted assets) (ratio)	6.00%	6.00%
Actual Tier I Capital (to average assets)	141,547	138,497
Actual Tier I Capital (to average assets) (ratio)	9.09%	8.83%
Minimum Tier I Capital (to average assets)	62,287	62,768
Minimum Tier I Capital (to average assets) (ratio)	4.00%	4.00%
Well Capitalized Tier I Capital (to average assets)	$ 77,859	$ 78,460
Well Capitalized Tier I Capital (to average assets) (ratio)	5.00%	5.00%