Note 10 - Borrowed Funds (Detail) - Securities Sold Under Agreements to Repurchase (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
No. of Agreements	4
Amount (in Dollars)	$ 200,000
Weighted Average Interest Rate	2.78%
Maturing in Three to Five Years [Member]
No. of Agreements	2
Amount (in Dollars)	100,000
Weighted Average Interest Rate	2.71%
Maturing in More Than Five Years [Member]
No. of Agreements	2
Amount (in Dollars)	$ 100,000
Weighted Average Interest Rate	2.86%