Loans and Allowance - Breakdown of loans (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ (3,564)	$ (4,003)
Total loans	305,518	253,096
Loans Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivables, gross	314,784	261,642
Unamortized deferred loan costs	484	481
Undisbursed loans in process	(6,186)	(5,024)
Allowance for loan losses	(3,564)	(4,003)	(3,806)
Total loans	305,518	253,096
Loans Receivable | Residential Real Estate - Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivables, gross	10,784	8,308
Allowance for loan losses	(7)	(23)	(35)
Loans Receivable | Residential Real Estate - One-to-four family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivables, gross	137,402	111,198
Allowance for loan losses	(1,423)	(1,986)	(746)
Loans Receivable | Residential Real Estate - Multi-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivables, gross	19,988	18,582
Allowance for loan losses	(281)	(65)	(138)
Loans Receivable | Nonresidential real estate and agricultural land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivables, gross	106,433	83,284
Allowance for loan losses	(1,078)	(822)	(1,632)
Loans Receivable | Land and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivables, gross	15,722	19,081
Allowance for loan losses	(641)	(993)	(976)
Loans Receivable | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivables, gross	19,549	17,349
Allowance for loan losses	(133)	(70)	(157)
Loans Receivable | Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivables, gross	4,906	3,840
Allowance for loan losses	$ (1)	$ (44)	$ (122)