Loans and Allowance - Corporation's loan portfolio aging analysis (Details 4) (Loans Receivable, USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	$ 901	$ 1,102
60-89 Days Past Due	770	1,076
Greater than 90 Days	4,913	3,436
Total Past Due	6,584	5,614
Current	327,087	317,555
Purchased Credit Impaired Loans	1,873	2,857
Total Loans Receivables	335,544	326,026
Construction/Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due		207
60-89 Days Past Due
Greater than 90 Days	187	71
Total Past Due	187	278
Current	25,457	23,692
Purchased Credit Impaired Loans	411	337
Total Loans Receivables	26,055	24,307
1-4 family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	418	458
60-89 Days Past Due	760	671
Greater than 90 Days	2,855	2,322
Total Past Due	4,033	3,451
Current	128,836	132,566
Purchased Credit Impaired Loans	1,035	1,281
Total Loans Receivables	133,904	137,298
Multi-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due
60-89 Days Past Due
Greater than 90 Days
Total Past Due
Current	20,936	15,908
Purchased Credit Impaired Loans		500
Total Loans Receivables	20,936	16,408
Nonresidential
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	458	267
60-89 Days Past Due		398
Greater than 90 Days	1,745	940
Total Past Due	2,203	1,605
Current	120,288	116,636
Purchased Credit Impaired Loans	403	705
Total Loans Receivables	122,894	118,946
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due		66
60-89 Days Past Due
Greater than 90 Days	116	96
Total Past Due	116	162
Current	27,731	24,564
Purchased Credit Impaired Loans	14	15
Total Loans Receivables	27,861	24,741
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
30-59 Days Past Due	25	104
60-89 Days Past Due	10	7
Greater than 90 Days	10	7
Total Past Due	45	118
Current	3,839	4,189
Purchased Credit Impaired Loans	10	19
Total Loans Receivables	$ 3,894	$ 4,326