Regulatory Matters (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Consolidated [Member]
Actual capital amounts and ratios of the Bank
Total Capital (to Risk Weighted Assets), Actual, Amount	$ 266,057	$ 258,871
Total Capital (to Risk Weighted Assets), Actual, Ratio	14.31%	13.94%
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	148,775	148,529
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
Total Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio
Tier 1 Capital (to Risk Weighted Assets), Actual, Amount	242,500	235,349
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	13.04%	12.68%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	74,388	74,265
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
Tier 1 Capital (to Risk Weighted Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio
Tier 1 Capital (to Average Assets), Actual, Amount	242,500	235,349
Tier 1 Capital (to Average Assets), Actual, Ratio	97.30%	9.46%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	99,676	99,563
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
Tier 1 Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio
Tri Counties Bank [Member]
Actual capital amounts and ratios of the Bank
Total Capital (to Risk Weighted Assets), Actual, Amount	263,587	258,425
Total Capital (to Risk Weighted Assets), Actual, Ratio	14.81%	13.93%
Total Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	148,675	148,429
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	185,844	185,536
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	240,045	234,919
Tier 1 Capital (to Risk Weighted Assets), Actual, Ratio	12.92%	12.66%
Tier 1 Capital (to Risk Weighted Assets), Minimum Capital Requirement, Amount	74,337	74,214
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	111,506	111,322
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	240,045	234,919
Tier 1 Capital (to Average Assets), Actual, Ratio	96.40%	9.44%
Tier 1 Capital (to Average Assets), Minimum Capital Requirement, Amount	99,624	99,511
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	$ 124,530	$ 124,389
Tier 1 Capital (to Average Assets), Minimum to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	5.00%	5.00%