Loans and Allowance for Loan Losses, Troubled Debt Restructurings (Details) (USD $)	3 Months Ended		9 Months Ended								3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2013 Contract	Sep. 30, 2012 Contract	Sep. 30, 2013 Contract	Sep. 30, 2012 Contract	Sep. 30, 2013 Lessors of Nonresidential Buildings [Member]	Dec. 31, 2012 Lessors of Nonresidential Buildings [Member]	Sep. 30, 2013 Lessors of Residential Buildings [Member]	Dec. 31, 2012 Lessors of Residential Buildings [Member]	Sep. 30, 2013 Land Subdividers [Member]	Dec. 31, 2012 Land Subdividers [Member]	Sep. 30, 2013 Commercial Real Estate - Mortgage [Member] Contract	Sep. 30, 2012 Commercial Real Estate - Mortgage [Member] Contract	Sep. 30, 2013 Commercial Real Estate - Mortgage [Member] Contract	Sep. 30, 2012 Commercial Real Estate - Mortgage [Member] Contract	Sep. 30, 2013 Consumer Real Estate - Mortgage [Member] Contract	Sep. 30, 2012 Consumer Real Estate - Mortgage [Member] Contract	Sep. 30, 2013 Consumer Real Estate - Mortgage [Member] Contract	Sep. 30, 2012 Consumer Real Estate - Mortgage [Member] Contract	Sep. 30, 2013 Construction and Land Development [Member] Contract	Sep. 30, 2012 Construction and Land Development [Member] Contract	Sep. 30, 2013 Construction and Land Development [Member] Contract	Sep. 30, 2012 Construction and Land Development [Member] Contract	Sep. 30, 2013 Commercial and Industrial [Member] Contract	Sep. 30, 2012 Commercial and Industrial [Member] Contract	Sep. 30, 2013 Commercial and Industrial [Member] Contract	Sep. 30, 2012 Commercial and Industrial [Member] Contract	Sep. 30, 2013 Consumer and Other [Member] Contract	Sep. 30, 2012 Consumer and Other [Member] Contract	Sep. 30, 2013 Consumer and Other [Member] Contract	Sep. 30, 2012 Consumer and Other [Member] Contract
Troubled debt restructuring categorized by loan classification [Abstract]
Number of contracts	2	0	6	5							0	0	0	3	0	0	1	2	0	0	1	0	1	0	2	0	1	0	2	0
Pre Modification Outstanding Recorded Investment	$ 95,000	$ 0	$ 2,273,000	$ 1,735,000							$ 0	$ 0	$ 0	$ 1,387,000	$ 0	$ 0	$ 428,000	$ 348,000	$ 0	$ 0	$ 50,000	$ 0	$ 37,000	$ 0	$ 1,537,000	$ 0	$ 58,000	$ 0	$ 258,000	$ 0
Post Modification Outstanding Recorded Investment, net of related allowance	83,000	0	1,956,000	1,306,000							0	0	0	1,011,000	0	0	368,000	295,000	0	0	43,000	0	32,000	0	1,322,000	0	51,000	0	223,000	0
Troubled debt restructurings performing as of restructure date	19,700,000	27,500,000	19,700,000	27,500,000
Number of contracts of troubled debt restructurings subsequently defaulted																	1								3				2
Troubled debt restructurings subsequently defaulted																	480,000								175,000				153,000
Percentage of credit exposure to risk based capital (in hundredths)	25.00%		25.00%
Loan portfolio credit risk exposure [Abstract]
Financing receivables principal balance					448,268,000		241,353,000		72,240,000
Financing receivables unfunded commitment					29,354,000		29,391,000		13,008,000
Financing receivables exposure					$ 477,622,000	$ 440,237,000	$ 270,744,000	$ 215,899,000	$ 85,248,000	$ 108,283,000