Note 10 - Fair Value of Financial Instruments (Details) - Quantitative information about recurring Level 3 fair value of financial instruments and the fair value measurements: (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Spread to index [Member] | Assets, recurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input	Spread to index
Range	(3.40%)
Junior subordinated debentures	Spread to index
Junior subordinated debentures	(3.40%)
Spread to index [Member] | Assets, recurring [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	2.40%
Junior subordinated debentures	2.40%
Spread to index [Member] | Assets, recurring [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	4.30%
Junior subordinated debentures	4.30%
Loss severity [Member] | Assets, recurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input	Loss Severity
Range	(55.60%)
Junior subordinated debentures	Loss Severity
Junior subordinated debentures	(55.60%)
Loss severity [Member] | Assets, recurring [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	40.00%
Junior subordinated debentures	40.00%
Loss severity [Member] | Assets, recurring [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	70.00%
Junior subordinated debentures	70.00%
Prepayment Speeds [Member] | Assets, recurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input	Prepayment speeds
Range	(6.90%)
Junior subordinated debentures	Prepayment speeds
Junior subordinated debentures	(6.90%)
Prepayment Speeds [Member] | Assets, recurring [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	1.00%
Junior subordinated debentures	1.00%
Prepayment Speeds [Member] | Assets, recurring [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	10.00%
Junior subordinated debentures	10.00%
Defaults [Member] | Assets, recurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input	Defaults
Range	(8.00%)
Junior subordinated debentures	Defaults
Junior subordinated debentures	(8.00%)
Defaults [Member] | Assets, recurring [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	3.00%
Junior subordinated debentures	3.00%
Defaults [Member] | Assets, recurring [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	11.10%
Junior subordinated debentures	11.10%
REMIC And CMO [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value (in Dollars)	$ 22,930	$ 23,475
Valuation Technique	Discounted cash flows
Unobservable Input	Average Life (years)
Range	(5.40%)
Junior subordinated debentures	Discounted cash flows
Junior subordinated debentures	Average Life (years)
Junior subordinated debentures	(5.40%)
REMIC And CMO [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	4.10%
Junior subordinated debentures	4.10%
REMIC And CMO [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	7.50%
Junior subordinated debentures	7.50%
Municipal [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value (in Dollars)	9,327	9,429
Valuation Technique	Discounted cash flows
Unobservable Input	Discount rate
Range	(3.60%)
Junior subordinated debentures	Discounted cash flows
Junior subordinated debentures	Discount rate
Junior subordinated debentures	(3.60%)
Municipal [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	0.40%
Junior subordinated debentures	0.40%
Municipal [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	4.00%
Junior subordinated debentures	4.00%
Municipal - 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input	Discount rate
Range	(11.60%)
Junior subordinated debentures	Discount rate
Junior subordinated debentures	(11.60%)
Municipal - 1 [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	8.00%
Junior subordinated debentures	8.00%
Municipal - 1 [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	16.10%
Junior subordinated debentures	16.10%
Municipal - 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input	Prepayment assumptions
Range	(33.30%)
Junior subordinated debentures	Prepayment assumptions
Junior subordinated debentures	(33.30%)
Municipal - 2 [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	0.00%
Junior subordinated debentures	0.00%
Municipal - 2 [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	45.50%
Junior subordinated debentures	45.50%
Trust Preferred Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value (in Dollars)	8,367	6,650
Valuation Technique	Discounted cash flows
Unobservable Input	Defaults
Range	(9.20%)
Junior subordinated debentures	Discounted cash flows
Junior subordinated debentures	Defaults
Junior subordinated debentures	(9.20%)
Trust Preferred Securities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	0.00%
Junior subordinated debentures	0.00%
Trust Preferred Securities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	17.30%
Junior subordinated debentures	17.30%
Junior subordinated debentures [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation Technique	Discounted cash flows
Unobservable Input	Discount rate
Range	(8.00%)
Junior subordinated debentures (in Dollars)	$ 26,192	$ 23,922
Junior subordinated debentures	Discounted cash flows
Junior subordinated debentures	Discount rate
Junior subordinated debentures	(8.00%)
Junior subordinated debentures [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	8.00%
Junior subordinated debentures	8.00%
Junior subordinated debentures [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range	8.00%
Junior subordinated debentures	8.00%