Loans and Allowance - Credit risk profile of Corporation's loan portfolio based on rating category (Details 3) (Loans Receivable, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 314,784	$ 261,642
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	283,242	235,655
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,057	7,188
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	16,286	18,748
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,199	51
Construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,784	8,308
Construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	9,593	8,308
Construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	192
Construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	999
Construction | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans
1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	137,402	111,198
1-4 family residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	123,705	100,827
1-4 family residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,597	2,891
1-4 family residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,885	7,429
1-4 family residential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,215	51
Multi-family residential
Financing Receivable, Recorded Investment [Line Items]
Total loans	19,988	18,582
Multi-family residential | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,546	16,616
Multi-family residential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	186
Multi-family residential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,256	1,966
Multi-family residential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans
Nonresidential
Financing Receivable, Recorded Investment [Line Items]
Total loans	106,433	83,284
Nonresidential | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	97,307	75,966
Nonresidential | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,931	3,441
Nonresidential | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,793	3,877
Nonresidential | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,402
Land
Financing Receivable, Recorded Investment [Line Items]
Total loans	15,722	19,081
Land | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,359	13,457
Land | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	122	505
Land | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,910	5,119
Land | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	331
Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	19,549	17,349
Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	18,869	16,685
Commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	15	329
Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	414	335
Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	251
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,906	3,840
Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,863	3,796
Consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	14	22
Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	29	22
Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans