Loans and Allowance - Credit risk profile of Corporation's loan portfolio based on rating category (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 298,857	$ 309,082
Loans Receivable
Financing Receivable, Recorded Investment [Line Items]
Loans	308,458	314,784
Loans Receivable | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	277,734	283,242
Loans Receivable | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	10,697	12,057
Loans Receivable | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	17,803	16,286
Loans Receivable | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	2,224	3,199
Loans Receivable | Construction / Land
Financing Receivable, Recorded Investment [Line Items]
Loans	23,237	26,506
Loans Receivable | Construction / Land | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	18,040	20,952
Loans Receivable | Construction / Land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	225	314
Loans Receivable | Construction / Land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	4,972	4,909
Loans Receivable | Construction / Land | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans		331
Loans Receivable | 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Loans	134,487	137,402
Loans Receivable | 1-4 family residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	122,292	123,705
Loans Receivable | 1-4 family residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	4,716	6,597
Loans Receivable | 1-4 family residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	6,451	5,885
Loans Receivable | 1-4 family residential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	1,028	1,215
Loans Receivable | Multi-family residential
Financing Receivable, Recorded Investment [Line Items]
Loans	17,280	19,988
Loans Receivable | Multi-family residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	15,309	17,546
Loans Receivable | Multi-family residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	185	186
Loans Receivable | Multi-family residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	1,786	2,256
Loans Receivable | Multi-family residential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans
Loans Receivable | Nonresidential real estate and agricultural land
Financing Receivable, Recorded Investment [Line Items]
Loans	106,555	106,433
Loans Receivable | Nonresidential real estate and agricultural land | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	95,888	97,307
Loans Receivable | Nonresidential real estate and agricultural land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	5,527	4,931
Loans Receivable | Nonresidential real estate and agricultural land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	4,188	2,793
Loans Receivable | Nonresidential real estate and agricultural land | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	952	1,402
Loans Receivable | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	22,701	19,549
Loans Receivable | Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	22,052	18,869
Loans Receivable | Commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	33	15
Loans Receivable | Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	372	414
Loans Receivable | Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	244	251
Loans Receivable | Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans	4,198	4,906
Loans Receivable | Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	4,153	4,863
Loans Receivable | Consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	11	14
Loans Receivable | Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	34	29
Loans Receivable | Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans