Borrowings - Narrative (Details) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended
	Jul. 01, 2008	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Long-term Federal Home Loan Bank Advances		$ 2,200,000								$ 2,200,000
Federal Home Loan Bank, Advance, Term of Advance										18 years
Federal Home Loan Bank, Advance, Repayment Term										30 years
Purchase of main office facility	12,900,000
Date of purchase	Jul. 01, 2008
Note secured by building	5,100,000	4,300,000								4,300,000
Maturity date										Apr. 01, 2014
Interest rate		5.95%								5.95%
Loans Pledged as Collateral		0				0				0	0
Interest paid, less than $1,000										2,035,000	2,510,000	3,792,000
Securities sold under agreements to repurchase		21,143,000				19,038,000				21,143,000	19,038,000
Percentaged paid on securities sold under agreements to repurchase		0.08%				0.25%				0.08%	0.25%
Average balance outstanding		19,400,000				16,500,000				19,400,000	16,500,000
Maximum amount outstanding at any month end										24,000,000	22,600,000
Interest expense on deposits, borrowings and junior subordinated debentures		497,000	502,000	511,000	530,000	569,000	611,000	627,000	698,000	2,040,000	2,505,000	3,544,000
Debt, Weighted Average Interest Rate		5.13%				5.95%				5.13%	5.95%	5.95%
FHLB Of Seattle
Debt Instrument [Line Items]
Ratio of line of credit to eligible assets		13.00%								13.00%
Line of credit		155,600,000								155,600,000
Note Agreement With Federal Reserve Bank
Debt Instrument [Line Items]
Loans Pledged as Collateral		89,900,000								89,900,000
Interest paid, less than $1,000										1,000	1,000
Discount Window
Debt Instrument [Line Items]
Loans Pledged as Collateral		60,900,000								60,900,000
FHLB and Secured Debt
Debt Instrument [Line Items]
Interest expense on deposits, borrowings and junior subordinated debentures										$ 340,000	$ 329,000	$ 352,000