Note 7 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Note 7 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	161	240
Securities in an unrealized loss position less than 12 months fair value	$ 12,624	$ 200,036
Securities in an unrealized loss position less than 12 months unrealized losses	(108)	(6,615)
Securities in an unrealized loss position 12 months or longer fair value	140,072	29,404
Securities in an unrealized loss position 12 months or longer unrealized losses	(4,566)	(3,001)
Securities in an unrealized loss position fair value	152,696	229,440
Securities in an unrealized loss position unrealized losses	(4,674)	(9,616)
US Government Agencies Debt Securities [Member]
Note 7 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	25	44
Securities in an unrealized loss position less than 12 months fair value	1,996	54,563
Securities in an unrealized loss position less than 12 months unrealized losses	(2)	(1,548)
Securities in an unrealized loss position 12 months or longer fair value	29,772	2,846
Securities in an unrealized loss position 12 months or longer unrealized losses	(621)	(154)
Securities in an unrealized loss position fair value	31,768	57,409
Securities in an unrealized loss position unrealized losses	(623)	(1,702)
State and Municipal [Member]
Note 7 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	54	87
Securities in an unrealized loss position less than 12 months fair value	3,780	33,750
Securities in an unrealized loss position less than 12 months unrealized losses	(23)	(1,379)
Securities in an unrealized loss position 12 months or longer fair value	19,973	4,288
Securities in an unrealized loss position 12 months or longer unrealized losses	(372)	(248)
Securities in an unrealized loss position fair value	23,753	38,038
Securities in an unrealized loss position unrealized losses	(395)	(1,627)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 7 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	34	54
Securities in an unrealized loss position less than 12 months fair value	2,771	75,720
Securities in an unrealized loss position less than 12 months unrealized losses	(8)	(2,238)
Securities in an unrealized loss position 12 months or longer fair value	45,702	1,884
Securities in an unrealized loss position 12 months or longer unrealized losses	(798)	(123)
Securities in an unrealized loss position fair value	48,473	77,604
Securities in an unrealized loss position unrealized losses	(806)	(2,361)
Collateralized Mortgage Obligations [Member]
Note 7 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	39	45
Securities in an unrealized loss position less than 12 months fair value	3,138	33,622
Securities in an unrealized loss position less than 12 months unrealized losses	(26)	(1,413)
Securities in an unrealized loss position 12 months or longer fair value	42,683	18,567
Securities in an unrealized loss position 12 months or longer unrealized losses	(1,499)	(921)
Securities in an unrealized loss position fair value	45,821	52,189
Securities in an unrealized loss position unrealized losses	(1,525)	(2,334)
Pooled Trust Preferred Securities [Member]
Note 7 - 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	1,942	1,683
Securities in an unrealized loss position 12 months or longer unrealized losses	(1,276)	(1,535)
Securities in an unrealized loss position fair value	1,942	1,683
Securities in an unrealized loss position unrealized losses	(1,276)	(1,535)
Equity Securities [Member]
Note 7 - Investment Securities (Details) - Securities in a Continuous Unrealized Loss Position [Line Items]
No. of securities	4	3
Securities in an unrealized loss position less than 12 months fair value	939	394
Securities in an unrealized loss position less than 12 months unrealized losses	(49)	(24)
Securities in an unrealized loss position 12 months or longer fair value		136
Securities in an unrealized loss position 12 months or longer unrealized losses		(20)
Securities in an unrealized loss position fair value	939	530
Securities in an unrealized loss position unrealized losses	(49)	(44)
Corporate Debt Securities [Member]
Note 7 - 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)