Note 13 - Regulatory Matters (Details) (USD $)	0 Months Ended	3 Months Ended		0 Months Ended
	Mar. 25, 2015	Mar. 31, 2015	Mar. 31, 2014	Apr. 16, 2015	Jan. 30, 2015	Dec. 31, 2014	Dec. 31, 2009
Note 13 - Regulatory Matters (Details) [Line Items]
Trust Preferred Securities Included in Tier One Capital		$ 52,600,000				$ 52,400,000
Maximum Restricted Core Element Allowed in Tier One Capital, Percent		25.00%
Maximum Level of Consolidated Aggregate Assets Allowing for Inclusion of Trust Preferred Securities in Tier One Capital							15,000,000,000
Preferred Securities of Subsidiary Trust		52,600,000				52,400,000
Common Stock, Dividends, Per Share, Cash Paid (in Dollars per share)	$ 0.14	$ 0.14	$ 0.12
Stock Repurchase Program, Authorized Amount					20,000,000
Subsequent Event [Member]
Note 13 - Regulatory Matters (Details) [Line Items]
Common Stock, Dividends, Per Share, Declared (in Dollars per share)				$ 0.14
Repurchased Stock [Member]
Note 13 - Regulatory Matters (Details) [Line Items]
Stock Repurchased During Period, Shares (in Shares)		104,000
Share Price (in Dollars per share)		$ 19.09
Stock Repurchased During Period, Value		$ 2,000,000