Loans and Allowance for Loan Losses - Troubled Debt Restructured Loans (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013 Loans	Jun. 30, 2012 Loans	Jun. 30, 2013 Loans	Jun. 30, 2012 Loans	Dec. 31, 2012
Troubled Debt Restructurings
Total amount of troubled debt restructured loans outstanding	$ 21,800,000		$ 21,800,000		$ 23,700,000
Allowance for troubled debt restructed loans	747,521		747,521		746,581
Amount of troubled debt restructured loans accruing interest	16,500,000		16,500,000		17,700,000
Number of Loans	1	9	3	22
Recorded Investment After Modification	499,000	2,224,000	889,000	5,020,000
Number of troubled debt restructured loans with a payment default during the period	0	2	3	5
Recorded investment of troubled debt restructured loans with payment default during period	0	997,000	714,000	2,315,000
Below Market Rate
Troubled Debt Restructurings
Number of troubled debt restructured loans with a payment default during the period		0		2
Recorded investment of troubled debt restructured loans with payment default during period		0		1,061,000
Principal Payment Reducation
Troubled Debt Restructurings
Number of Loans		1		3
Recorded Investment After Modification		399,000		577,000
Number of troubled debt restructured loans with a payment default during the period		1		2
Recorded investment of troubled debt restructured loans with payment default during period		973,000		1,230,000
Extended Payment Terms [Member]
Troubled Debt Restructurings
Number of Loans		8		19
Recorded Investment After Modification		1,825,000		4,443,000
Number of troubled debt restructured loans with a payment default during the period		1		1
Recorded investment of troubled debt restructured loans with payment default during period		24,000		24,000
Extended Payment Terms [Member] | Consumer Loan [Member]
Troubled Debt Restructurings
Number of troubled debt restructured loans with a payment default during the period		1		1
Recorded investment of troubled debt restructured loans with payment default during period		24,000		24,000
Real Estate Loans | Below Market Rate | Construction Loans
Troubled Debt Restructurings
Number of troubled debt restructured loans with a payment default during the period		0		2
Recorded investment of troubled debt restructured loans with payment default during period		0		1,061,000
Real Estate Loans | Principal Payment Reducation | Construction Loans
Troubled Debt Restructurings
Number of troubled debt restructured loans with a payment default during the period		1		2
Recorded investment of troubled debt restructured loans with payment default during period		973,000		1,230,000
Real Estate Loans | Principal Payment Reducation | Owner Occupied Commercial [Member]
Troubled Debt Restructurings
Number of Loans		1		2
Recorded Investment After Modification		399,000		568,000
Real Estate Loans | Principal Payment Reducation | Consumer Loan [Member]
Troubled Debt Restructurings
Number of Loans				1
Real Estate Loans | Extended Payment Terms [Member] | Construction Loans
Troubled Debt Restructurings
Number of Loans		0		0
Recorded Investment Prior to Modification		352,000		352,000
Number of troubled debt restructured loans with a payment default during the period	0		2
Recorded investment of troubled debt restructured loans with payment default during period	0		593,000
Real Estate Loans | Extended Payment Terms [Member] | Owner Occupied Commercial [Member]
Troubled Debt Restructurings
Number of Loans	0	3	2	5
Recorded Investment After Modification	499,000	1,026,000	724,000	1,669,000
Real Estate Loans | Extended Payment Terms [Member] | Non-owner Occupied
Troubled Debt Restructurings
Number of Loans	0	1	1	1
Recorded Investment After Modification	0	211,000	165,000	211,000
Number of troubled debt restructured loans with a payment default during the period	0		1
Recorded investment of troubled debt restructured loans with payment default during period	0		121,000
Real Estate Loans | Extended Payment Terms [Member] | One to Four Family
Troubled Debt Restructurings
Number of Loans		0		3
Recorded Investment After Modification		0		742,000
Commercial Loan | Extended Payment Terms [Member]
Troubled Debt Restructurings
Number of Loans		1		6
Recorded Investment After Modification		236,000		1,469,000
Consumer Loan [Member] | Principal Payment Reducation
Troubled Debt Restructurings
Number of Loans		0
Recorded Investment After Modification		0		9,000
Consumer Loan [Member] | Extended Payment Terms [Member]
Troubled Debt Restructurings
Number of Loans		0		1
Recorded Investment After Modification		$ 0		$ 0