Consolidated Balance Sheets (USD $)	Dec. 31, 2012	Dec. 31, 2011
ASSETS
Cash and due from banks	$ 55,461,000	$ 23,768,000
Interest-bearing deposits in banks	750,000	1,250,000
Investment securities (Note 5):
Available-for-sale, at fair value	231,839,000	208,711,000
Held-to-maturity, at amortized cost	2,117,000	4,010,000
Loans and leases, less allowance for loan and lease losses of $5,781 in 2012 and $7,041 in 2011 (Notes 6, 7, 12 and 17)	252,118,000	293,731,000
Premises and equipment, net (Note 8)	1,888,000	2,355,000
Federal Home Loan Bank of San Francisco stock	3,254,000	3,093,000
Other real estate owned, net	12,237,000	8,190,000
Goodwill (Note 4)	16,321,000	16,321,000
Intangible assets (Note 4)		183,000
Bank-owned life insurance (Note 16)	12,858,000	11,292,000
Accrued interest receivable and other assets (Notes 11 and 16)	7,546,000	8,614,000
	596,389,000	581,518,000
Deposits:
Noninterest-bearing	151,201,000	133,440,000
Interest-bearing (Note 9)	327,055,000	328,845,000
Total deposits	478,256,000	462,285,000
Short-term borrowings (Note 10)	2,000,000	5,000,000
Long-term borrowings (Note 10)	16,000,000	14,000,000
Accrued interest payable and other liabilities (Note 16)	6,139,000	6,134,000
Total liabilities	502,395,000	487,419,000
Shareholders' equity (Notes 13 and 14):
Common stock - no par value; 20,000,000 shares authorized;issued and outstanding – 9,327,203 shares in 2012 and 9,890,909 shares in 2011	67,977,000	72,016,000
Retained earnings	21,732,000	18,525,000
Accumulated other comprehensive income, net of taxes
(Note 5)	4,285,000	3,558,000
Total shareholders' equity	93,994,000	94,099,000
	$ 596,389,000	$ 581,518,000