Note 3 - Securities (Details) - Securities in a Continuous Loss Position (USD $)	Jun. 30, 2014	Dec. 31, 2013
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities available for sale, continuous unrealized loss position, less than 12 months	$ 254,971,000	$ 58,767,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	(1,351,000)	(5,833,000)
Securities available for sale, continuous unrealized loss position, 12 months or more	70,554,000	29,679,000
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	(5,798,000)	(4,267,000)
Securities available for sale, continuous unrealized loss position	325,525,000	88,446,000
Securities available for sale, continuous unrealized loss position, unrealized loss	(7,149,000)	(10,100,000)
US Government Agencies Debt Securities [Member]
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities available for sale, continuous unrealized loss position, less than 12 months	90,627,000	57,117,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	(373,000)	(5,798,000)
Securities available for sale, continuous unrealized loss position, 12 months or more	69,159,000	29,679,000
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	(5,793,000)	(4,267,000)
Securities available for sale, continuous unrealized loss position	159,786,000	86,796,000
Securities available for sale, continuous unrealized loss position, unrealized loss	(6,166,000)	(10,065,000)
Collateralized Mortgage Backed Securities [Member]
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities available for sale, continuous unrealized loss position, less than 12 months	64,108,000	0
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	(222,000)	0
Securities available for sale, continuous unrealized loss position, 12 months or more	0	0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	0	0
Securities available for sale, continuous unrealized loss position	64,108,000	0
Securities available for sale, continuous unrealized loss position, unrealized loss	(222,000)	0
Municipal General Obligation Bonds [Member]
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities available for sale, continuous unrealized loss position, less than 12 months	92,461,000	295,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	(721,000)	(4,000)
Securities available for sale, continuous unrealized loss position, 12 months or more	0	0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	0	0
Securities available for sale, continuous unrealized loss position	92,461,000	295,000
Securities available for sale, continuous unrealized loss position, unrealized loss	(721,000)	(4,000)
Municipal Revenue Bonds [Member]
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities available for sale, continuous unrealized loss position, less than 12 months	7,775,000	0
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	(35,000)	0
Securities available for sale, continuous unrealized loss position, 12 months or more	0	0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	0	0
Securities available for sale, continuous unrealized loss position	7,775,000	0
Securities available for sale, continuous unrealized loss position, unrealized loss	(35,000)	0
Other Debt Obligations [Member]
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities available for sale, continuous unrealized loss position, less than 12 months	0
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss	0
Securities available for sale, continuous unrealized loss position, 12 months or more	1,395,000
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss	(5,000)
Securities available for sale, continuous unrealized loss position	1,395,000
Securities available for sale, continuous unrealized loss position, unrealized loss	(5,000)
Mutual Funds [Member]
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities available for sale, continuous unrealized loss position, less than 12 months		1,355,000
Securities available for sale, continuous unrealized loss position, less than 12 months, unrealized loss		(31,000)
Securities available for sale, continuous unrealized loss position, 12 months or more		0
Securities available for sale, continuous unrealized loss position, 12 months or more, unrealized loss		0
Securities available for sale, continuous unrealized loss position		1,355,000
Securities available for sale, continuous unrealized loss position, unrealized loss		$ (31,000)