Advances from the Federal Home Loan Bank (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Summary of types of advances from the Federal Home Loan Bank
Weighted Average Rate	3.46%	3.63%
Weighted Average Maturity (years)	2 years 7 months 21 days	2 years 5 months 12 days
Balance	$ 53,297	$ 63,604
Fixed-rate, balloon [Member]
Summary of types of advances from the Federal Home Loan Bank
Weighted Average Rate	3.25%	3.25%
Weighted Average Maturity (years)	2 years 5 months 1 day	3 years 5 months 1 day
Balance	209	218
Fixed-rate, interest only [Member]
Summary of types of advances from the Federal Home Loan Bank
Weighted Average Rate	0.75%	2.48%
Weighted Average Maturity (years)	2 years 5 months 5 days	1 year 4 months 10 days
Balance	22,000	17,000
Fixed-rate, amortizing [Member]
Summary of types of advances from the Federal Home Loan Bank
Weighted Average Rate	6.08%	6.06%
Weighted Average Maturity (years)	5 years 7 months 17 days	6 years 3 months 26 days
Balance	1,088	1,386
Fixed-rate, interest only, convertible [Member]
Summary of types of advances from the Federal Home Loan Bank
Weighted Average Rate	3.97%	3.70%
Weighted Average Maturity (years)	2 years 6 months 26 days	3 years 1 month 21 days
Balance	20,000	25,000
Fixed-rate, interest only, putable [Member]
Summary of types of advances from the Federal Home Loan Bank
Weighted Average Rate	4.11%	4.34%
Weighted Average Maturity (years)	2 years 11 months 12 days	2 years 2 months 27 days
Balance	$ 10,000	$ 20,000