Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Securities Sold Under Agreements to Repurchase (Non-Callable Fixed Rate Securities Sold Under Agreements to Repurchase [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Securities Sold Under Agreements to Repurchase [Line Items]
No. of Agreements	4
Amount (in Dollars)	$ 200,000
Weighted Average Interest Rate	2.78%
Maturing in Three to Five Years [Member]
Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Securities Sold Under Agreements to Repurchase [Line Items]
No. of Agreements	3
Amount (in Dollars)	150,000
Weighted Average Interest Rate	2.71%
Maturing in More Than Five Years [Member]
Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Securities Sold Under Agreements to Repurchase [Line Items]
No. of Agreements	1
Amount (in Dollars)	$ 50,000
Weighted Average Interest Rate	2.98%