Note 13 - Stockholders' Equity (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Note 13 - Stockholders' Equity (Details) [Line Items]
Treasury Stock, Shares, Acquired	914,671	836,092
Treasury Stock Acquired, Average Cost Per Share	$ 19.29	$ 15.73
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 635,199
Common Stock [Member] | Shareholder Rights Plan [Member]
Note 13 - Stockholders' Equity (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	1
Common Stock Equivalent [Member] | Shareholder Rights Plan [Member]
Note 13 - Stockholders' Equity (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	1
Shareholder Rights Plan [Member]
Note 13 - Stockholders' Equity (Details) [Line Items]
Number of Rights To Purchase Series A Junior Participating Preferred Stock Per Common Stock Owned	1
Purchase Price of Series A Junior Participating Preferred Stock, Per Right To Purchase	65
Percentage Ownership of Holding Company's Common Stock At Which Rights Become Exercisable	15.00%
Percentage of Common Stock Prior To Acquisition	50.00%
Percentage of Assets or Earning Power Sold	50.00%
Available to Distribute to the Holding Company as Cash Dividends [Member]
Note 13 - Stockholders' Equity (Details) [Line Items]
Retained Earnings, Unappropriated	60,400,000
Savings Bank [Member]
Note 13 - Stockholders' Equity (Details) [Line Items]
Liquidation Account, Conversion From Mutual to Stock Form	$ 1,000,000