Note 4 - Investment Securities (Details) - Pooled Trust Preferred Securities (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Note 4 - Investment Securities (Details) - Pooled Trust Preferred Securities [Line Items]
Book value	$ 393,840,000		$ 394,750,000
Available-for-sale Securities	388,670,000		401,502,000
Total recognized OTTI credit loss	(43,000)		(105,000)
PreTSL IV [Member]
Note 4 - Investment Securities (Details) - Pooled Trust Preferred Securities [Line Items]
Class	Mezzanine*	[1]
Book value	243,000	[1]
Available-for-sale Securities	200,000	[1]
Unrealized gains (losses)	(43,000)	[1]
Total recognized OTTI credit loss	(1,000)	[1]
Moody's/Fitch ratings	B1/B	[1]
Current number of performing banks	5	[1]
Actual deferrals and defaults as a % of total collateral	18.00%	[1]
Total performing collateral as a % of outstanding bonds	139.70%	[1]
PreTSL V [Member]
Note 4 - Investment Securities (Details) - Pooled Trust Preferred Securities [Line Items]
Class	Mezzanine*
Total recognized OTTI credit loss	(118,000)	[1]
Moody's/Fitch ratings	C/D	[1]
Actual deferrals and defaults as a % of total collateral	100.00%	[1]
Total performing collateral as a % of outstanding bonds	12.90%	[1]
PreTSL XVII [Member]
Note 4 - Investment Securities (Details) - Pooled Trust Preferred Securities [Line Items]
Class	Mezzanine
Book value	752,000
Available-for-sale Securities	432,000
Unrealized gains (losses)	(320,000)
Total recognized OTTI credit loss	(222,000)
Moody's/Fitch ratings	C/C
Current number of performing banks	32
Current number of performing insurance companies	5
Actual deferrals and defaults as a % of total collateral	32.90%
Total performing collateral as a % of outstanding bonds	79.10%
PreTSL XIX [Member]
Note 4 - Investment Securities (Details) - Pooled Trust Preferred Securities [Line Items]
Class	Mezzanine
Book value	988,000
Available-for-sale Securities	427,000
Unrealized gains (losses)	(561,000)
Total recognized OTTI credit loss	0
Moody's/Fitch ratings	C/C
Current number of performing banks	36
Current number of performing insurance companies	13
Actual deferrals and defaults as a % of total collateral	22.60%
Total performing collateral as a % of outstanding bonds	82.70%
PreTSL XXV [Member]
Note 4 - Investment Securities (Details) - Pooled Trust Preferred Securities [Line Items]
Class	Mezzanine
Book value	766,000
Available-for-sale Securities	339,000
Unrealized gains (losses)	(427,000)
Total recognized OTTI credit loss	(222,000)
Moody's/Fitch ratings	C/C
Current number of performing banks	42
Current number of performing insurance companies	6
Actual deferrals and defaults as a % of total collateral	33.00%
Total performing collateral as a % of outstanding bonds	81.10%
PreTSL XXVI [Member]
Note 4 - Investment Securities (Details) - Pooled Trust Preferred Securities [Line Items]
Class	Mezzanine
Book value	469,000
Available-for-sale Securities	285,000
Unrealized gains (losses)	(184,000)
Total recognized OTTI credit loss	(270,000)
Moody's/Fitch ratings	C/C
Current number of performing banks	40
Current number of performing insurance companies	7
Actual deferrals and defaults as a % of total collateral	30.20%
Total performing collateral as a % of outstanding bonds	84.00%
PreTSL XXVII [Member]
Note 4 - Investment Securities (Details) - Pooled Trust Preferred Securities [Line Items]
Class	Mezzanine
Book value	301,000
Available-for-sale Securities	386,000
Unrealized gains (losses)	85,000
Total recognized OTTI credit loss	(438,000)
Moody's/Fitch ratings	C/C
Current number of performing banks	40
Current number of performing insurance companies	7
Actual deferrals and defaults as a % of total collateral	30.20%
Total performing collateral as a % of outstanding bonds	84.00%
Pooled Trust Preferred Securities [Member]
Note 4 - Investment Securities (Details) - Pooled Trust Preferred Securities [Line Items]
Book value	3,519,000		3,519,000
Available-for-sale Securities	2,069,000		1,962,000
Unrealized gains (losses)	(1,450,000)
Total recognized OTTI credit loss	$ (1,271,000)

[1] Mezzanine* - only class of bonds still outstanding (represents the senior-most obligation of the trust)