Loans and Allowance for Loan Losses - Impaired Loans (Details) (USD $)	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2013	Jun. 30, 2012	Jun. 30, 2012	Sep. 30, 2013	Dec. 31, 2012
Impaired Loans
Impaired financing receivable collectively evaluated for impairment	$ 6,542,480			$ 6,542,480	$ 7,827,783
Threshold for individual impairment evaluation				250,000
Impaired loans with a related allowance for loan losses, related allowance	409,000			409,000	1,397,000
Total impaired loans, recorded investment	27,540,000			27,540,000	33,554,000
Total impaired loans, unpaid principal balance	29,931,000			29,931,000	36,561,000
Total impaired loans, average recorded investment	27,748,000	59,825,000	69,869,000	30,785,000
Total impaired loans, interest income recognized	304,000	273,000	1,169,000	767,000
Allowance for loan losses	21,014,000			21,014,000	25,149,000	[1]
Outstanding balance of purchased impaired loans	91,806			91,806
Impaired financing receivables, Allowance for credit losses, collectively evaluated for impairment	2,150,516			2,150,516	2,179,128
Allowance for Purchased Impaired Loans Excess Credit Discount
Impaired Loans
Allowance for loan losses	3,713			3,713	6,672
Real Estate Loans | Construction Loans
Impaired Loans
Impaired loans without a related allowance for loan losses, recorded investment	3,990,000			3,990,000	6,212,000
Impaired loans without a related allowance for loan losses, unpaid principal balance	4,345,000			4,345,000	7,676,000
Impaired loans without a related allowance for loan losses, average recorded investment	4,602,000	14,694,000	20,382,000	5,341,000
Impaired loans without a related allowance for loan losses, interest income recognized	39,000	125,000	275,000	99,000
Impaired loans with a related allowance for loan losses, recorded investment	0			0	1,958,000
Impaired loans with a related allowance for loan losses, unpaid principal balance	0			0	2,136,000
Impaired loans with a related allowance for loan losses, related allowance	0			0	191,000
Impaired loans with a related allowance for loan losses, average recorded investment	63,000	4,106,000	2,379,000	1,129,000
Impaired loans with a related allowance for loan losses, interest income recognized	0	0	0	25,000
Total impaired loans, recorded investment	3,990,000			3,990,000	8,170,000
Total impaired loans, unpaid principal balance	4,345,000			4,345,000	9,812,000
Total impaired loans, average recorded investment	4,665,000	18,800,000	22,761,000	6,470,000
Total impaired loans, interest income recognized	39,000	125,000	275,000	124,000
Real Estate Loans | Owner Occupied
Impaired Loans
Impaired loans without a related allowance for loan losses, recorded investment	7,058,000			7,058,000	6,563,000
Impaired loans without a related allowance for loan losses, unpaid principal balance	7,606,000			7,606,000	7,071,000
Impaired loans without a related allowance for loan losses, average recorded investment	5,417,000	13,840,000	15,594,000	4,140,000
Impaired loans without a related allowance for loan losses, interest income recognized	53,000	23,000	332,000	102,000
Impaired loans with a related allowance for loan losses, recorded investment	4,585,000			4,585,000	4,961,000
Impaired loans with a related allowance for loan losses, unpaid principal balance	4,584,000			4,584,000	5,082,000
Impaired loans with a related allowance for loan losses, related allowance	113,000			113,000	189,000
Impaired loans with a related allowance for loan losses, average recorded investment	5,349,000	6,154,000	6,910,000	6,752,000
Impaired loans with a related allowance for loan losses, interest income recognized	78,000	66,000	134,000	194,000
Total impaired loans, recorded investment	11,643,000			11,643,000	11,524,000
Total impaired loans, unpaid principal balance	12,190,000			12,190,000	12,153,000
Total impaired loans, average recorded investment	10,766,000	19,994,000	22,504,000	10,892,000
Total impaired loans, interest income recognized	131,000	89,000	466,000	296,000
Real Estate Loans | Non-owner Occupied
Impaired Loans
Impaired loans without a related allowance for loan losses, recorded investment	5,490,000			5,490,000	4,976,000
Impaired loans without a related allowance for loan losses, unpaid principal balance	5,559,000			5,559,000	5,358,000
Impaired loans without a related allowance for loan losses, average recorded investment	5,358,000	4,017,000	8,193,000	5,419,000
Impaired loans without a related allowance for loan losses, interest income recognized	70,000	29,000	39,000	183,000
Impaired loans with a related allowance for loan losses, recorded investment	0			0	561,000
Impaired loans with a related allowance for loan losses, unpaid principal balance	0			0	643,000
Impaired loans with a related allowance for loan losses, related allowance	0			0	89,000
Impaired loans with a related allowance for loan losses, average recorded investment	105,000	3,491,000	1,768,000	325,000
Impaired loans with a related allowance for loan losses, interest income recognized	0	26,000	42,000	2,000
Total impaired loans, recorded investment	5,490,000			5,490,000	5,537,000
Total impaired loans, unpaid principal balance	5,559,000			5,559,000	6,001,000
Total impaired loans, average recorded investment	5,463,000	7,508,000	9,961,000	5,744,000
Total impaired loans, interest income recognized	70,000	55,000	81,000	185,000
Real Estate Loans | One to Four Family
Impaired Loans
Impaired loans without a related allowance for loan losses, recorded investment	671,000			671,000	1,435,000
Impaired loans without a related allowance for loan losses, unpaid principal balance	736,000			736,000	1,503,000
Impaired loans without a related allowance for loan losses, average recorded investment	679,000	1,432,000	2,680,000	701,000
Impaired loans without a related allowance for loan losses, interest income recognized	10,000	0	29,000	24,000
Impaired loans with a related allowance for loan losses, recorded investment	649,000			649,000	0
Impaired loans with a related allowance for loan losses, unpaid principal balance	653,000			653,000	0
Impaired loans with a related allowance for loan losses, related allowance	296,000			296,000	0
Impaired loans with a related allowance for loan losses, average recorded investment	572,000	449,000	411,000	475,000
Impaired loans with a related allowance for loan losses, interest income recognized	1,000	0	3,000	4,000
Total impaired loans, recorded investment	1,320,000			1,320,000	1,435,000
Total impaired loans, unpaid principal balance	1,389,000			1,389,000	1,503,000
Total impaired loans, average recorded investment	1,251,000	1,881,000	3,091,000	1,176,000
Total impaired loans, interest income recognized	11,000	0	32,000	28,000
Real Estate Loans | Multifamily
Impaired Loans
Impaired loans without a related allowance for loan losses, recorded investment	249,000			249,000	530,000
Impaired loans without a related allowance for loan losses, unpaid principal balance	291,000			291,000	565,000
Impaired loans without a related allowance for loan losses, average recorded investment	253,000	703,000	702,000	257,000
Impaired loans without a related allowance for loan losses, interest income recognized	0	4,000	7,000	0
Impaired loans with a related allowance for loan losses, recorded investment	0			0	0
Impaired loans with a related allowance for loan losses, unpaid principal balance	0			0	0
Impaired loans with a related allowance for loan losses, related allowance	0			0	0
Impaired loans with a related allowance for loan losses, average recorded investment	0	0	30,000	0
Impaired loans with a related allowance for loan losses, interest income recognized	0	0	7,000	0
Total impaired loans, recorded investment	249,000			249,000	530,000
Total impaired loans, unpaid principal balance	291,000			291,000	565,000
Total impaired loans, average recorded investment	253,000	703,000	732,000	257,000
Total impaired loans, interest income recognized	0	4,000	14,000	0
Real Estate Loans | Home Equity Lines of Credit
Impaired Loans
Impaired loans without a related allowance for loan losses, recorded investment	429,000			429,000	705,000
Impaired loans without a related allowance for loan losses, unpaid principal balance	500,000			500,000	800,000
Impaired loans without a related allowance for loan losses, average recorded investment	451,000	1,588,000	1,320,000	462,000
Impaired loans without a related allowance for loan losses, interest income recognized	0	0	7,000	0
Impaired loans with a related allowance for loan losses, recorded investment	0			0	0
Impaired loans with a related allowance for loan losses, unpaid principal balance	0			0	0
Impaired loans with a related allowance for loan losses, related allowance	0			0	0
Impaired loans with a related allowance for loan losses, average recorded investment	185,000	29,000	111,000	520,000
Impaired loans with a related allowance for loan losses, interest income recognized	0	0	0	2,000
Total impaired loans, recorded investment	429,000			429,000	705,000
Total impaired loans, unpaid principal balance	500,000			500,000	800,000
Total impaired loans, average recorded investment	636,000	1,617,000	1,431,000	982,000
Total impaired loans, interest income recognized	0	0	7,000	2,000
Commercial
Impaired Loans
Impaired loans without a related allowance for loan losses, recorded investment	4,419,000			4,419,000	4,460,000
Impaired loans without a related allowance for loan losses, unpaid principal balance	5,657,000			5,657,000	4,482,000
Impaired loans without a related allowance for loan losses, average recorded investment	4,416,000	6,403,000	6,316,000	4,428,000
Impaired loans without a related allowance for loan losses, interest income recognized	53,000	0	130,000	132,000
Impaired loans with a related allowance for loan losses, recorded investment	0			0	1,193,000
Impaired loans with a related allowance for loan losses, unpaid principal balance	0			0	1,245,000
Impaired loans with a related allowance for loan losses, related allowance	0			0	928,000
Impaired loans with a related allowance for loan losses, average recorded investment	298,000	2,865,000	3,006,000	836,000
Impaired loans with a related allowance for loan losses, interest income recognized	0	0	164,000	0
Total impaired loans, recorded investment	4,419,000			4,419,000	5,653,000
Total impaired loans, unpaid principal balance	5,657,000			5,657,000	5,727,000
Total impaired loans, average recorded investment	4,714,000	9,268,000	9,322,000	5,264,000
Total impaired loans, interest income recognized	53,000	0	294,000	132,000
Consumer and other
Impaired Loans
Impaired loans without a related allowance for loan losses, recorded investment	0			0	0
Impaired loans without a related allowance for loan losses, unpaid principal balance	0			0	0
Impaired loans without a related allowance for loan losses, average recorded investment	0	0	0	0
Impaired loans without a related allowance for loan losses, interest income recognized	0	0	0	0
Impaired loans with a related allowance for loan losses, recorded investment	0			0	0
Impaired loans with a related allowance for loan losses, unpaid principal balance	0			0	0
Impaired loans with a related allowance for loan losses, related allowance	0			0	0
Impaired loans with a related allowance for loan losses, average recorded investment	0	54,000	67,000	0
Impaired loans with a related allowance for loan losses, interest income recognized	0	0	0	0
Total impaired loans, recorded investment	0			0	0
Total impaired loans, unpaid principal balance	0			0	0
Total impaired loans, average recorded investment	0	54,000	67,000	0
Total impaired loans, interest income recognized	$ 0	$ 0	$ 0	$ 0

[1] Derived from audited consolidated financial statements