Loans and Allowance for Loan Losses - Troubled Debt Restructured Loans (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013 Loans	Sep. 30, 2012 Loans	Sep. 30, 2013 Loans	Sep. 30, 2012 Loans	Dec. 31, 2012
Troubled Debt Restructurings
Total amount of troubled debt restructured loans outstanding	$ 21,300,000		$ 21,300,000		$ 23,700,000
Allowance for troubled debt restructured loans	519,791		519,791		746,581
Amount of troubled debt restructured loans accruing interest	16,000,000		16,000,000		17,700,000
Number of Loans		7		29
Recorded Investment After Modification		2,399,000		7,489,000
Number of troubled debt restructured loans with a payment default during the period	0	0	2	2
Recorded investment of troubled debt restructured loans with payment default during period	0	0	214,000	602,000
Below Market Rate
Troubled Debt Restructurings
Number of Loans		1		1
Recorded Investment After Modification		391,000		391,000
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		578,000
Principal Payment Reducation
Troubled Debt Restructurings
Number of Loans		0		3
Recorded Investment After Modification		0		580,000
Extended Payment Terms
Troubled Debt Restructurings
Number of Loans	2	6	5	25
Recorded Investment After Modification	593,000	2,008,000	1,481,000	6,518,000
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		24,000
Extended Payment Terms | Consumer Loan
Troubled Debt Restructurings
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		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		1
Recorded investment of troubled debt restructured loans with payment default during period		0		578,000
Real Estate Loans | Below Market Rate | One to Four Family
Troubled Debt Restructurings
Number of Loans		1		1
Recorded Investment After Modification		391,000		391,000
Real Estate Loans | Principal Payment Reducation | Owner Occupied
Troubled Debt Restructurings
Number of Loans		0		2
Recorded Investment After Modification		0		571,000
Real Estate Loans | Principal Payment Reducation | Consumer Loan
Troubled Debt Restructurings
Number of Loans				1
Real Estate Loans | Extended Payment Terms | Construction Loans
Troubled Debt Restructurings
Number of Loans		2		5
Recorded Investment After Modification		521,000		873,000
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		93,000
Real Estate Loans | Extended Payment Terms | Owner Occupied
Troubled Debt Restructurings
Number of Loans	2	2	4	7
Recorded Investment After Modification	593,000	331,000	1,316,000	2,021,000
Real Estate Loans | Extended Payment Terms | Non-owner Occupied
Troubled Debt Restructurings
Number of Loans	0	2	1	3
Recorded Investment After Modification	0	1,156,000	165,000	1,367,000
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 | One to Four Family
Troubled Debt Restructurings
Number of Loans		0		3
Recorded Investment After Modification		0		751,000
Commercial Loan | Extended Payment Terms
Troubled Debt Restructurings
Number of Loans		0		6
Recorded Investment After Modification		0		1,482,000
Consumer Loan | Principal Payment Reducation
Troubled Debt Restructurings
Number of Loans		0
Recorded Investment After Modification		0		9,000
Consumer Loan | Extended Payment Terms
Troubled Debt Restructurings
Number of Loans		0		1
Recorded Investment After Modification		$ 0		$ 24,000