Note 10 - Fair Value of Financial Instruments (Details) - Quantitative Information About Non-Recurring Level 3 Fair Value of Financial Instruments and the Fair Value Measurements (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Municipal [Member] \| Minimum [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Discount rate	0.40%	0.20%
Discount rate	(0.40%)	(0.20%)
Liabilities:
Discount rate	0.40%	0.20%
Discount rate	(0.40%)	(0.20%)
Municipal [Member] \| Maximum [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Discount rate	4.00%	4.00%
Discount rate	(4.00%)	(4.00%)
Liabilities:
Discount rate	4.00%	4.00%
Discount rate	(4.00%)	(4.00%)
Municipal [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Discount rate	2.50%	2.30%
Discount rate	(2.50%)	(2.30%)
Liabilities:
Discount rate	2.50%	2.30%
Discount rate	(2.50%)	(2.30%)
Municipal [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Fair value (in Dollars)	14,464	15,519
Assets:
Fair value (in Dollars)	14,464	15,519
Trust Preferred Securities [Member] \| Minimum [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Discount rate	7.00%	7.00%
Discount rate	(7.00%)	(7.00%)
Liabilities:
Discount rate	7.00%	7.00%
Discount rate	(7.00%)	(7.00%)
Trust Preferred Securities [Member] \| Maximum [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Discount rate	7.10%	7.25%
Discount rate	(7.10%)	(7.25%)
Liabilities:
Discount rate	7.10%	7.25%
Discount rate	(7.10%)	(7.25%)
Trust Preferred Securities [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Discount rate	7.10%	7.20%
Discount rate	(7.10%)	(7.20%)
Liabilities:
Discount rate	7.10%	7.20%
Discount rate	(7.10%)	(7.20%)
Trust Preferred Securities [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Fair value (in Dollars)	7,189	7,090
Assets:
Fair value (in Dollars)	7,189	7,090
Junior Subordinated Debentures [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Discount rate	7.00%	7.00%
Discount rate	(7.00%)	(7.00%)
Liabilities:
Discount rate	7.00%	7.00%
Discount rate	(7.00%)	(7.00%)
Junior Subordinated Debentures [Member] \| Fair Value, Measurements, Recurring [Member]
Assets:
Discount rate	7.00%	7.00%
Discount rate	(7.00%)	(7.00%)
Liabilities:
Fair value (in Dollars)	28,244	28,771
Discount rate	7.00%	7.00%
Discount rate	(7.00%)	(7.00%)
Impaired Loans [Member] \| Income Approach Valuation Technique [Member] \| Minimum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	7.00%	7.30%
Capitalization rate	(7.00%)	(7.30%)
Loss severity discount	0.50%	0.50%
Loss severity discount	(0.50%)	(0.50%)
Impaired Loans [Member] \| Income Approach Valuation Technique [Member] \| Maximum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	8.00%	8.50%
Capitalization rate	(8.00%)	(8.50%)
Loss severity discount	83.70%	81.70%
Loss severity discount	(83.70%)	(81.70%)
Impaired Loans [Member] \| Income Approach Valuation Technique [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	7.70%	7.80%
Capitalization rate	(7.70%)	(7.80%)
Loss severity discount	18.10%	21.30%
Loss severity discount	(18.10%)	(21.30%)
Impaired Loans [Member] \| Income Approach Valuation Technique [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Fair value (in Dollars)	4,937	6,981
Assets:
Fair value (in Dollars)	4,937	6,981
Impaired Loans [Member] \| Sales Approach Valuation Technique [Member] \| Minimum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loss severity discount	2.00%	1.80%
Loss severity discount	(2.00%)	(1.80%)
Adjustment to sales comparison value to reconcile differences between comparable sales	(50.00%)	(41.50%)
Impaired Loans [Member] \| Sales Approach Valuation Technique [Member] \| Maximum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loss severity discount	97.10%	89.40%
Loss severity discount	(97.10%)	(89.40%)
Adjustment to sales comparison value to reconcile differences between comparable sales	40.00%	40.00%
Impaired Loans [Member] \| Sales Approach Valuation Technique [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loss severity discount	17.10%	20.00%
Loss severity discount	(17.10%)	(20.00%)
Impaired Loans [Member] \| Sales Approach Valuation Technique [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Fair value (in Dollars)	5,552	6,935
Assets:
Fair value (in Dollars)	5,552	6,935
Impaired Loans [Member] \| Blended Income and Sales Approach [Member] \| Minimum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	5.60%	5.80%
Capitalization rate	(5.60%)	(5.80%)
Loss severity discount	0.90%	0.90%
Loss severity discount	(0.90%)	(0.90%)
Adjustment to sales comparison value to reconcile differences between comparable sales	(50.00%)	(55.00%)
Impaired Loans [Member] \| Blended Income and Sales Approach [Member] \| Maximum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	11.00%	11.00%
Capitalization rate	(11.00%)	(11.00%)
Loss severity discount	74.80%	74.40%
Loss severity discount	(74.80%)	(74.40%)
Adjustment to sales comparison value to reconcile differences between comparable sales	25.00%	25.00%
Impaired Loans [Member] \| Blended Income and Sales Approach [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	7.70%	8.00%
Capitalization rate	(7.70%)	(8.00%)
Loss severity discount	23.60%	30.00%
Loss severity discount	(23.60%)	(30.00%)
Impaired Loans [Member] \| Blended Income and Sales Approach [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Fair value (in Dollars)	7,143	8,258
Assets:
Fair value (in Dollars)	7,143	8,258
Other Real Estate Owned [Member] \| Income Approach Valuation Technique [Member] \| Minimum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	9.00%	9.00%
Capitalization rate	(9.00%)	(9.00%)
Loss severity discount	0.90%	0.90%
Loss severity discount	(0.90%)	(0.90%)
Other Real Estate Owned [Member] \| Income Approach Valuation Technique [Member] \| Maximum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	12.00%	12.00%
Capitalization rate	(12.00%)	(12.00%)
Loss severity discount	4.90%	4.90%
Loss severity discount	(4.90%)	(4.90%)
Other Real Estate Owned [Member] \| Income Approach Valuation Technique [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	9.10%	9.10%
Capitalization rate	(9.10%)	(9.10%)
Loss severity discount	1.00%	1.00%
Loss severity discount	(1.00%)	(1.00%)
Other Real Estate Owned [Member] \| Income Approach Valuation Technique [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Fair value (in Dollars)	4,768	4,768
Assets:
Fair value (in Dollars)	4,768	4,768
Other Real Estate Owned [Member] \| Sales Approach Valuation Technique [Member] \| Minimum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loss severity discount	46.10%	0.00%
Loss severity discount	(46.10%)	0.00%
Adjustment to sales comparison value to reconcile differences between comparable sales	(41.50%)	(11.90%)
Other Real Estate Owned [Member] \| Sales Approach Valuation Technique [Member] \| Maximum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loss severity discount	46.10%	36.90%
Loss severity discount	(46.10%)	(36.90%)
Adjustment to sales comparison value to reconcile differences between comparable sales	(23.70%)	15.00%
Other Real Estate Owned [Member] \| Sales Approach Valuation Technique [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loss severity discount	46.10%	9.60%
Loss severity discount	(46.10%)	(9.60%)
Other Real Estate Owned [Member] \| Sales Approach Valuation Technique [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Fair value (in Dollars)	94	587
Assets:
Fair value (in Dollars)	94	587
Other Real Estate Owned [Member] \| Blended Income and Sales Approach [Member] \| Minimum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	8.50%	7.50%
Capitalization rate	(8.50%)	(7.50%)
Loss severity discount	0.00%	0.00%
Loss severity discount	0.00%	0.00%
Adjustment to sales comparison value to reconcile differences between comparable sales	(55.00%)	(25.00%)
Other Real Estate Owned [Member] \| Blended Income and Sales Approach [Member] \| Maximum [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	9.20%	8.00%
Capitalization rate	(9.20%)	(8.00%)
Loss severity discount	23.90%	6.20%
Loss severity discount	(23.90%)	(6.20%)
Adjustment to sales comparison value to reconcile differences between comparable sales	5.00%	0.00%
Other Real Estate Owned [Member] \| Blended Income and Sales Approach [Member] \| Weighted Average [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Capitalization rate	8.70%	7.70%
Capitalization rate	(8.70%)	(7.70%)
Loss severity discount	6.80%	3.00%
Loss severity discount	(6.80%)	(3.00%)
Other Real Estate Owned [Member] \| Blended Income and Sales Approach [Member] \| Fair Value, Measurements, Nonrecurring [Member]
Assets:
Fair value (in Dollars)	390	971
Assets:
Fair value (in Dollars)	390	971

Note 10 - Fair Value of Financial Instruments (Details) - Quantitative Information About Non-Recurring Level 3 Fair Value of Financial Instruments and the Fair Value Measurements (USD $)
In Thousands, unless otherwise specified