Note 10 - Capital Stock (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Mar. 04, 2014	Jul. 23, 2012	Feb. 27, 2009
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, Shares Issued	0	0
Stock Repurchase Program, Number of Shares Authorized to be Repurchased				850,000
Percent of Oustanding Stock				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)			$ 300
Maximum [Member]
Note 10 - Capital Stock (Details) [Line Items]
Preferred Stock, Liquidation Preference Per Share (in Dollars per share)					$ 80,000,000