Annual report pursuant to Section 13 and 15(d)

Other Regulatory Matters (Details Textuals)

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Other Regulatory Matters (Details Textuals) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Banking and Thrift [Abstract]    
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.00%  
Capital Required for Capital Adequacy to Risk Weighted Assets 8.00%  
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00%  
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 6.00%  
Capital Required to be Well Capitalized to Risk Weighted Assets 10.00%  
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 5.00%  
Amount Bank Could Lend To Single Affiliate $ 609,400,000  
Average required reserve balance on deposits 400,000,000 800,000,000
Additional dividends that could have been declared without regulatory approval 0  
Stock Repurchase Program, Authorized Amount $ 182,000,000