Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Callable Securities Sold Under Agreements to Repurchase (Callable [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Fixed to Floating Fifty Million with One Agreement at Three Point Seven Five Percent [Member]
Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Callable Securities Sold Under Agreements to Repurchase [Line Items]
Maximum rate	3.75%
Minimum rate	0.00%
No. of agreements	1
Amount (in Dollars)	$ 50,000
Weighted average rate	3.75%
Final maturity	2,014
Fixed to Floating One Hundred Million with Two Agreements at Three Point Five Percent [Member]
Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Callable Securities Sold Under Agreements to Repurchase [Line Items]
Maximum rate	3.50%
Minimum rate	0.00%
No. of agreements	2
Amount (in Dollars)	100,000
Weighted average rate	3.50%
Final maturity	2,014
Fixed to Floating One Hundred and Fifty Million with 3 Agreements at Three Point Five Percent [Member]
Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Callable Securities Sold Under Agreements to Repurchase [Line Items]
Maximum rate	3.50%
Minimum rate	0.00%
No. of agreements	3
Amount (in Dollars)	150,000
Weighted average rate	3.50%
Final maturity	2,015
Floating to Fixed One Hundred Million with One Agreement at Four Point Seven Eight Percent [Member]
Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Callable Securities Sold Under Agreements to Repurchase [Line Items]
No. of agreements	1
Amount (in Dollars)	100,000
Weighted average rate	4.78%
Final maturity	2,014
Floating to Fixed Two Hundred million with 4 Agreements at Five Percent [Member]
Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Callable Securities Sold Under Agreements to Repurchase [Line Items]
No. of agreements	4
Amount (in Dollars)	200,000
Weighted average rate	5.00%
Final maturity	2,017
Eleven Total Agreements for Six Hundred Million at Four Point Two Four Percent [Member]
Note 9 - Securities Sold Under Agreements to Repurchase (Details) - Callable Securities Sold Under Agreements to Repurchase [Line Items]
No. of agreements	11
Amount (in Dollars)	$ 600,000
Weighted average rate	4.24%