NOTE 10 - SUBORDINATED DEBENTURES (Detail) (USD $)	12 Months Ended			5 Months Ended	6 Months Ended	12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 North Valley Capital Trust I [Member]	Dec. 31, 2012 North Valley Capital Trust I [Member]	Dec. 31, 2012 North Valley Capital Trust I [Member]	Dec. 31, 2012 North Valley Capital Trust I [Member]	Dec. 31, 2012 Debentures B[Member]	Dec. 31, 2012 DebenturesC[Member]	Dec. 31, 2012 DebenturesD[Member]
Proceeds from Issuance of Trust Preferred Securities	$ 21,000,000
Junior Subordinated Notes	22,000,000
Payment on Accrued Interest					5,854,000
Repayments of Subordinated Debt	10,310,000			10,310,000		16,500,000
Debt Instrument, Interest Rate, Stated Percentage							10.25%
Subordinated Borrowing, Interest Rate	3.56%							3.25%	2.80%	1.33%
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate								3.12%	1.64%
Debentures, Accrued Interest Payable	4,854,000	79,000
Tier One Risk Based Capital	21,000,000	29,331,000
Tier Two Risk Based Capital		1,669,000
Deferred Costs, Current	6,000	26,000
Other Deferred Cost, Amortization Expense	$ 42,000	$ 65,000	$ 20,000