Loans and Allowance - Credit risk profile of Corporation's loan portfolio based on rating category (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 298,402	$ 309,082
Loans Receivable
Financing Receivable, Recorded Investment [Line Items]
Loans	318,055	314,784
Loans Receivable | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	288,166	283,242
Loans Receivable | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	9,246	12,057
Loans Receivable | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	19,092	16,286
Loans Receivable | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	1,551	3,199
Loans Receivable | Construction / Land
Financing Receivable, Recorded Investment [Line Items]
Loans	26,493	26,506
Loans Receivable | Construction / Land | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	21,739	20,952
Loans Receivable | Construction / Land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	121	314
Loans Receivable | Construction / Land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	4,633	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	144,745	137,402
Loans Receivable | 1-4 family residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	132,333	123,705
Loans Receivable | 1-4 family residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	4,416	6,597
Loans Receivable | 1-4 family residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	7,075	5,885
Loans Receivable | 1-4 family residential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	921	1,215
Loans Receivable | Multi-family residential
Financing Receivable, Recorded Investment [Line Items]
Loans	17,828	19,988
Loans Receivable | Multi-family residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	16,208	17,546
Loans Receivable | Multi-family residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	44	186
Loans Receivable | Multi-family residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	1,576	2,256
Loans Receivable | Multi-family residential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans
Loans Receivable | Nonresidential and agricultural land
Financing Receivable, Recorded Investment [Line Items]
Loans	103,640	106,433
Loans Receivable | Nonresidential and agricultural land | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	93,413	97,307
Loans Receivable | Nonresidential and agricultural land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	4,651	4,931
Loans Receivable | Nonresidential and agricultural land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	5,024	2,793
Loans Receivable | Nonresidential and agricultural land | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	552	1,402
Loans Receivable | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	20,853	19,549
Loans Receivable | Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	20,031	18,869
Loans Receivable | Commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	12	15
Loans Receivable | Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	732	414
Loans Receivable | Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	78	251
Loans Receivable | Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans	4,496	4,906
Loans Receivable | Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	4,442	4,863
Loans Receivable | Consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	2	14
Loans Receivable | Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	52	29
Loans Receivable | Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans