Note 10 - Capital Stock (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jul. 23, 2012	Feb. 27, 2009	Nov. 28, 2007	Mar. 04, 2014 Subsequent Event [Member]	Feb. 27, 2009 Maximum [Member]
Note 10 - Capital Stock (Details) [Line Items]
Preferred Stock, Shares Authorized	40,040,000	40,040,000		40,040,000
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)	$ 0.01	$ 0.01		$ 0.01
Preferred Stock, Liquidation Preference, Value (in Dollars)							$ 80,000,000
Preferred Stock, Shares Issued	0	0
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			850,000		700,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased As A Percent Of Shares Outstanding			5.00%
Stock Repurchased During Period, Shares	419,564
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 25.89
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	154,136
Shelf Registration Statement, Max Capital Allowed to Raise (in Dollars)						$ 200,000,000