Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Details) - Information Relating to All Repurchase Agreements Which Are Collateralized by Mortgage-Backed Securities (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Information Relating to All Repurchase Agreements Which Are Collateralized by Mortgage-Backed Securities [Abstract]
Book value of collateral	$ 199,447	$ 228,620
Estimated fair value of collateral	199,447	228,620
Average balance of outstanding agreements during the year	172,944	185,300
Maximum balance of outstanding agreements at a month end during the year	$ 185,300	$ 185,300
Average interest rate of outstanding agreements during the year	3.42%	3.62%