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Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) - Preferred Stock Redeemed (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Series F Preferred Stock [Member]  
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) - Preferred Stock Redeemed [Line Items]  
Depositary Shares Issued 7,000,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember		 [1]
Redemption Amount $ 175.0us-gaap_PreferredStockRedemptionAmount
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
Offering/ Redemption Price $ 25.00us-gaap_PreferredStockRedemptionPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesFPreferredStockMember
Series G Preferred Stock [Member]  
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) - Preferred Stock Redeemed [Line Items]  
Depositary Shares Issued 18,400,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember		 [2]
Redemption Amount $ 460.0us-gaap_PreferredStockRedemptionAmount
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
Offering/ Redemption Price $ 25.00us-gaap_PreferredStockRedemptionPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
[1] In connection with this redemption the Company recorded a non-cash charge of $6.2 million resulting from the difference between the redemption amount and the carrying amount of the Class F Preferred Stock on the Company's Consolidated Balance Sheets in accordance with the FASB's guidance on Distinguishing Liabilities from Equity. The $6.2 million was subtracted from net income to arrive at net income available to common shareholders and is used in the calculation of earnings per share for the year ended December 31, 2012.
[2] In connection with this redemption the Company recorded a non-cash charge of $15.5 million resulting from the difference between the redemption amount and the carrying amount of the Class G Preferred Stock on the Company's Consolidated Balance Sheets in accordance with the FASB's guidance on Distinguishing Liabilities from Equity. The $15.5 million was subtracted from net income to arrive at net income available to common shareholders and is used in the calculation of earnings per share for the year ended December 31, 2012.