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	9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Assets, recurring [Member] | Spread to index [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO	Spread to index
Unobservable Input	Spread to index
Junior subordinated debentures	Spread to index
Assets, recurring [Member] | Loss severity [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO	Loss Severity
Unobservable Input	Loss Severity
Junior subordinated debentures	Loss Severity
Assets, recurring [Member] | Prepayment Speeds [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO	Prepayment speeds
Unobservable Input	Prepayment speeds
Junior subordinated debentures	Prepayment speeds
Assets, recurring [Member] | Defaults [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO	Defaults
Unobservable Input	Defaults
Junior subordinated debentures	Defaults
Assets, recurring [Member] | Minimum [Member] | Spread to index [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	2.10%
Junior subordinated debentures	2.10%
Assets, recurring [Member] | Minimum [Member] | Loss severity [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	40.00%
Junior subordinated debentures	40.00%
Assets, recurring [Member] | Minimum [Member] | Prepayment Speeds [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	1.00%
Junior subordinated debentures	1.00%
Assets, recurring [Member] | Minimum [Member] | Defaults [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	3.00%
Junior subordinated debentures	3.00%
Assets, recurring [Member] | Maximum [Member] | Spread to index [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	3.90%
Junior subordinated debentures	3.90%
Assets, recurring [Member] | Maximum [Member] | Loss severity [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	70.00%
Junior subordinated debentures	70.00%
Assets, recurring [Member] | Maximum [Member] | Prepayment Speeds [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	9.60%
Junior subordinated debentures	9.60%
Assets, recurring [Member] | Maximum [Member] | Defaults [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	16.00%
Junior subordinated debentures	16.00%
Assets, recurring [Member] | Weighted Average [Member] | Spread to index [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	(3.40%)
Junior subordinated debentures	(3.40%)
Assets, recurring [Member] | Weighted Average [Member] | Loss severity [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	(53.10%)
Junior subordinated debentures	(53.10%)
Assets, recurring [Member] | Weighted Average [Member] | Prepayment Speeds [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	(6.40%)
Junior subordinated debentures	(6.40%)
Assets, recurring [Member] | Weighted Average [Member] | Defaults [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	(9.00%)
Junior subordinated debentures	(9.00%)
REMIC And CMO [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO (in Dollars)	$ 20,194	$ 22,930	$ 23,475
REMIC and CMO	Discounted cash flows
REMIC and CMO	Average Life (years)
Fair Value (in Dollars)	20,194	22,930	23,475
Valuation Technique	Discounted cash flows
Unobservable Input	Average Life (years)
Junior subordinated debentures	Discounted cash flows
Junior subordinated debentures	Average Life (years)
REMIC And CMO [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO	3 years 255 days
REMIC And CMO [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO	15 years 36 days
REMIC And CMO [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO	minus 6 years 73 days
Municipal [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO (in Dollars)	9,275	9,327	9,429
REMIC and CMO	Discounted cash flows
REMIC and CMO	Discount rate
Fair Value (in Dollars)	9,275	9,327	9,429
Valuation Technique	Discounted cash flows
Unobservable Input	Discount rate
Junior subordinated debentures	Discounted cash flows
Junior subordinated debentures	Discount rate
Municipal [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	0.40%
Junior subordinated debentures	0.40%
Municipal [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	4.00%
Junior subordinated debentures	4.00%
Municipal [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	(3.60%)
Junior subordinated debentures	(3.60%)
Municipal - 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO	Discount rate
Unobservable Input	Discount rate
Junior subordinated debentures	Discount rate
Municipal - 1 [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	8.00%
Junior subordinated debentures	8.00%
Municipal - 1 [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	18.10%
Junior subordinated debentures	18.10%
Municipal - 1 [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	(12.20%)
Junior subordinated debentures	(12.20%)
Municipal - 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO	Prepayment assumptions
Unobservable Input	Prepayment assumptions
Junior subordinated debentures	Prepayment assumptions
Municipal - 2 [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	0.00%
Junior subordinated debentures	0.00%
Municipal - 2 [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	44.30%
Junior subordinated debentures	44.30%
Municipal - 2 [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	(32.20%)
Junior subordinated debentures	(32.20%)
Trust Preferred Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO (in Dollars)	7,506	8,367	6,650	6,096	5,653	5,632
REMIC and CMO	Discounted cash flows
REMIC and CMO	Defaults
Fair Value (in Dollars)	7,506	8,367	6,650	6,096	5,653	5,632
Valuation Technique	Discounted cash flows
Unobservable Input	Defaults
Junior subordinated debentures	Discounted cash flows
Junior subordinated debentures	Defaults
Trust Preferred Securities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	0.00%
Junior subordinated debentures	0.00%
Trust Preferred Securities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	15.60%
Junior subordinated debentures	15.60%
Trust Preferred Securities [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	(12.10%)
Junior subordinated debentures	(12.10%)
Junior subordinated debentures [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
REMIC and CMO	Discounted cash flows
REMIC and CMO	Discount rate
Valuation Technique	Discounted cash flows
Unobservable Input	Discount rate
Junior subordinated debentures (in Dollars)	$ 26,465	$ 26,192	$ 23,922	$ 23,709	$ 24,356	$ 26,311
Junior subordinated debentures	Discounted cash flows
Junior subordinated debentures	Discount rate
Junior subordinated debentures [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	8.00%
Junior subordinated debentures	8.00%
Junior subordinated debentures [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Range (Weighted Average)	(8.00%)
Junior subordinated debentures	(8.00%)