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Regulatory Capital Matters (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Ratios [Abstract]    
Tier 1 capital to total average assets (in hundredths) 8.00%  
Total risk-based capital to total risk-weighted assets (in hundredths) 10.00%  
Consolidated [Member]
   
Total Capital to Risk-Weighted Assets [Abstract]    
Actual Amount $ 119,920 $ 118,913
For Capital Adequacy Purposes, Amount 57,608 57,658
Amount [Abstract]    
Actual Amount 110,852 109,822
For Capital Adequacy Purposes, Amount 28,804 28,829
Ratios [Abstract]    
Actual Ratio (in hundredths) 16.65% 16.50%
For Capital Adequacy Purposes, Ratio (in hundredths) 8.00% 8.00%
Actual Ratio (in hundredths) 15.39% 15.24%
For Capital Adequacy Purposes, Ratio (in hundredths) 4.00% 4.00%
Amount [Abstract]    
Actual Amount 110,852 109,822
For Capital Adequacy Purposes, Amount 44,027 46,185
Ratios [Abstract]    
Actual Ratio (in hundredths) 10.07% 9.51%
For Capital Adequacy Purposes, Ratio (in hundredths) 4.00% 4.00%
Colony Bank [Member]
   
Total Capital to Risk-Weighted Assets [Abstract]    
Actual Amount 119,921 117,243
For Capital Adequacy Purposes, Amount 57,512 57,584
To be Well Capitalized Under Prompt Corrective Actions Provisions, Amount 71,890 71,980
Amount [Abstract]    
Actual Amount 110,868 108,163
For Capital Adequacy Purposes, Amount 28,756 28,792
To be Well Capitalized Under Prompt Corrective Actions Provisions, Amount 43,134 43,188
Ratios [Abstract]    
Actual Ratio (in hundredths) 16.68% 16.29%
For Capital Adequacy Purposes, Ratio (in hundredths) 8.00% 8.00%
To be Well Capitalized Under Prompt Corrective Actions Provisions, Ratio (in hundredths) 10.00% 10.00%
Actual Ratio (in hundredths) 15.42% 15.03%
For Capital Adequacy Purposes, Ratio (in hundredths) 4.00% 4.00%
To be Well Capitalized Under Prompt Corrective Actions Provisions, Ratio (in hundredths) 6.00% 6.00%
Amount [Abstract]    
Actual Amount 110,868 108,163
For Capital Adequacy Purposes, Amount 43,957 46,117
To be Well Capitalized Under Prompt Corrective Actions Provisions, Amount $ 54,946 $ 57,646
Ratios [Abstract]    
Actual Ratio (in hundredths) 10.09% 9.38%
For Capital Adequacy Purposes, Ratio (in hundredths) 4.00% 4.00%
To be Well Capitalized Under Prompt Corrective Actions Provisions, Ratio (in hundredths) 5.00% 5.00%