Note 12 - Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 25, 2015	Oct. 26, 2015	Sep. 30, 2015	Dec. 31, 2014
Note 12 - Preferred Stock (Details) [Line Items]
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)			$ 1.00	$ 1.00
Preferred Stock, Liquidation Preference, Value			$ 975,000	$ 975,000
Scenario, Forecast [Member] | Redeemable Series H Preferred Stock [Member]
Note 12 - Preferred Stock (Details) [Line Items]
Preferred Stock, Redemption Amount	$ 175,000
Preferred Stock, Amount of Preferred Dividends in Arrears	1,300
Subsequent Event [Member] | Redeemable Series H Preferred Stock [Member]
Note 12 - Preferred Stock (Details) [Line Items]
Stock Redeemed or Called During Period, Shares (in Shares)		7,000,000
Preferred Stock, Dividend Rate, Percentage		6.90%
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)		$ 1.00
Scenario, Forecast [Member] | Redeemable Series H Preferred Stock [Member]
Note 12 - Preferred Stock (Details) [Line Items]
Preferred Stock, Liquidation Preference, Value	$ 5,800