Note 4 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Note 4 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	240	59
Securities in an unrealized loss position less than 12 months fair value	$ 200,036	$ 52,886
Securities in an unrealized loss position less than 12 months unrealized losses	(6,615)	(343)
Securities in an unrealized loss position 12 months or longer fair value	29,404	1,881
Securities in an unrealized loss position 12 months or longer unrealized losses	(3,001)	(1,650)
Securities in an unrealized loss position fair value	229,440	54,767
Securities in an unrealized loss position unrealized losses	(9,616)	(1,993)
US Government Agencies Debt Securities [Member]
Note 4 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	44	4
Securities in an unrealized loss position less than 12 months fair value	54,563	3,992
Securities in an unrealized loss position less than 12 months unrealized losses	(1,548)	(19)
Securities in an unrealized loss position 12 months or longer fair value	2,846
Securities in an unrealized loss position 12 months or longer unrealized losses	(154)
Securities in an unrealized loss position fair value	57,409	3,992
Securities in an unrealized loss position unrealized losses	(1,702)	(19)
State and Municipal [Member]
Note 4 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	87	15
Securities in an unrealized loss position less than 12 months fair value	33,750	6,472
Securities in an unrealized loss position less than 12 months unrealized losses	(1,379)	(91)
Securities in an unrealized loss position 12 months or longer fair value	4,288
Securities in an unrealized loss position 12 months or longer unrealized losses	(248)
Securities in an unrealized loss position fair value	38,038	6,472
Securities in an unrealized loss position unrealized losses	(1,627)	(91)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 4 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	54	9
Securities in an unrealized loss position less than 12 months fair value	75,720	13,439
Securities in an unrealized loss position less than 12 months unrealized losses	(2,238)	(33)
Securities in an unrealized loss position 12 months or longer fair value	1,884
Securities in an unrealized loss position 12 months or longer unrealized losses	(123)
Securities in an unrealized loss position fair value	77,604	13,439
Securities in an unrealized loss position unrealized losses	(2,361)	(33)
Collateralized Mortgage Obligations [Member]
Note 4 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	45	19
Securities in an unrealized loss position less than 12 months fair value	33,622	28,396
Securities in an unrealized loss position less than 12 months unrealized losses	(1,413)	(155)
Securities in an unrealized loss position 12 months or longer fair value	18,567
Securities in an unrealized loss position 12 months or longer unrealized losses	(921)
Securities in an unrealized loss position fair value	52,189	28,396
Securities in an unrealized loss position unrealized losses	(2,334)	(155)
Pooled Trust Preferred Securities [Member]
Note 4 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	5	5
Securities in an unrealized loss position 12 months or longer fair value	1,683	1,609
Securities in an unrealized loss position 12 months or longer unrealized losses	(1,535)	(1,608)
Securities in an unrealized loss position fair value	1,683	1,609
Securities in an unrealized loss position unrealized losses	(1,535)	(1,608)
Corporate Debt Securities [Member]
Note 4 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	2
Securities in an unrealized loss position less than 12 months fair value	1,987
Securities in an unrealized loss position less than 12 months unrealized losses	(13)
Securities in an unrealized loss position fair value	1,987
Securities in an unrealized loss position unrealized losses	(13)
Equity Securities [Member]
Note 4 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	3	7
Securities in an unrealized loss position less than 12 months fair value	394	587
Securities in an unrealized loss position less than 12 months unrealized losses	(24)	(45)
Securities in an unrealized loss position 12 months or longer fair value	136	272
Securities in an unrealized loss position 12 months or longer unrealized losses	(20)	(42)
Securities in an unrealized loss position fair value	530	859
Securities in an unrealized loss position unrealized losses	$ (44)	$ (87)