Regulatory Matters (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Consolidated [Member]
Actual capital amounts and ratios of the Bank
Total Capital (to Risk Weighted Assets), Actual, Amount	$ 280,792	$ 273,979
Total Capital (to Risk Weighted Assets), Actual, Ratio	15.19%	14.53%
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	147,908	150,896
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	8.00%	8.00%
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	257,435	250,133
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	13.92%	13.27%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	73,954	75,448
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	4.00%	4.00%
Tier 1 Capital (to Average Assets), Actual, Amount	257,435	250,133
Tier 1 Capital (to Average Assets), Actual, Ratio	9.93%	9.82%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	103,710	101,918
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Ratio	4.00%	4.00%
Tri Counties Bank [Member]
Actual capital amounts and ratios of the Bank
Total Capital (to Risk Weighted Assets), Actual, Amount	278,540	271,723
Total Capital (to Risk Weighted Assets), Actual, Ratio	15.08%	14.42%
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	147,808	150,796
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	8.00%	8.00%
Total Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Amount	184,661	188,495
Total Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	255,199	247,892
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	13.81%	13.16%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	73,904	75,398
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Ratio	4.00%	4.00%
Tier 1 Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Amount	110,856	113,097
Tier 1 Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.00%	6.00%
Tier 1 Capital (to Average Assets), Actual, Amount	255,189	247,892
Tier 1 Capital (to Average Assets), Actual, Ratio	9.85%	9.73%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	103,658	101,866
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Ratio	4.00%	4.00%
Tier 1 Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Amount	$ 129,572	$ 127,333
Tier 1 Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%