Borrowings (Details) (USD $)		12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 Pacific Coast Banker's Bank [Member]	Dec. 31, 2011 Pacific Coast Banker's Bank [Member]	Dec. 31, 2012 Federal Home Loan Bank advances [Member]	Dec. 31, 2011 Federal Home Loan Bank advances [Member]	Dec. 31, 2012 Federal Reserve Bank advances [Member]	Dec. 31, 2011 Federal Reserve Bank advances [Member]	Dec. 31, 2012 Line of Credit [Member] FHLB of Seattle [Member]	Sep. 30, 2012 Line of Credit [Member] FHLB of Seattle [Member]	Dec. 31, 2011 Line of Credit [Member] FHLB of Seattle [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity, percentage of assets (in hundredths)								35.00%
Maximum borrowing capacity under loan agreement								$ 133,400,000
Amount available to borrow under loan agreement		2,000,000						90,700,000		83,500,000
Outstanding borrowings		0	0			0	0	21,900,000		8,500,000
Letters of credit to secured deposits									31,500,000	24,000,000
Line of credit, amount available								37,300,000		51,000,000
Contractual principal repayments [Abstract]
2013	19,643,000
2014	643,000
2015	643,000
2016	643,000
2017	292,000
Total payments of long-term debt	21,864,000
Weighted average interest rate (Abstract]
2013 (in hundredths)	0.97%
2014 (in hundredths)	2.47%
2015 (in hundredths)	2.47%
2016 (in hundredths)	2.47%
2017 (in hundredths)	2.47%
Total (in hundredths)	1.12%
Unused borrowing capacity						11,800,000	21,900,000
Term period		2 years
Maturity date		Jun. 30, 2014
Maximum balance				21,864,000	24,596,000	0	0
Average balances				$ 8,901,000	$ 14,249,000	$ 0	$ 0
Weighted average interest rate (in hundredths)				2.02%	1.97%