Regulatory Capital (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Total capital (to risk-weighted assets)
Actual, Amount	$ 161,557	$ 139,862
Actual, Ratio	12.42%	13.12%
For capital adequacy purposes, Amount	104,062	85,282
For capital adequacy purposes, Ratio	8.00%	8.00%
For well capitalized purposes, Amount	130,078	106,602
For well capitalized purposes, Ratio	10.00%	10.00%
Tier 1 capital (to risk-weighted assets)
Actual, Amount	145,273	126,467
Actual, Ratio	11.17%	11.86%
For capital adequacy purposes, Amount	52,023	42,653
For capital adequacy purposes, Ratio	4.00%	4.00%
For well capitalized purposes, Amount	78,034	63,980
For well capitalized purposes, Ratio	6.00%	6.00%
Tier 1 capital (to average assets)
Actual, Amount	145,273	126,467
Actual, Ratio	8.22%	8.50%
For capital adequacy purposes, Amount	70,692	59,514
For capital adequacy purposes, Ratio	4.00%	4.00%
For well capitalized purposes, Amount	88,366	74,392
For well capitalized purposes, Ratio	5.00%	5.00%
Consolidated [Member]
Total capital (to risk-weighted assets)
Actual, Amount	178,638	151,396
Actual, Ratio	13.72%	14.20%
For capital adequacy purposes, Amount	104,162	85,294
For capital adequacy purposes, Ratio	8.00%	8.00%
Tier 1 capital (to risk-weighted assets)
Actual, Amount	162,354	138,001
Actual, Ratio	12.47%	12.94%
For capital adequacy purposes, Amount	52,078	42,659
For capital adequacy purposes, Ratio	4.00%	4.00%
Tier 1 capital (to average assets)
Actual, Amount	162,354	138,001
Actual, Ratio	9.17%	9.27%
For capital adequacy purposes, Amount	$ 70,820	$ 59,547
For capital adequacy purposes, Ratio	4.00%	4.00%