Note 4 - Loans (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2010
LoansGainsLosses	$ 7,422,000	[1]		[1]
Mortgage Loan Sales [Member]
Disposal of Loans Held For Sale	50,300,000
LoansGainsLosses	$ 2,269,000	[1]

[1] Except for mortgage loan sales, amount represents gains (losses) on sales of loans subsequent to transfer to held-for-sale and is included in other noninterest income in the Consolidated Statements of Income. Gains (losses) on mortgage loan sales are included in other service charges, commissions, and fees in the Consolidated Statements of Income.