Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) (USD $)	0 Months Ended	1 Months Ended		12 Months Ended
	Oct. 10, 2012	Aug. 31, 2012	Aug. 31, 2010	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) [Line Items]
Repayments of Secured Debt			$ 150,000,000
Preferred Stock Redemption Premium	15,500,000	6,200,000				21,703,000
Stock Repurchased During Period, Shares				128,147	144,727	106,010
Stock Repurchased During Period, Value						30,947,000
Proceeds from Stock Options Exercised						22,600,000
Stockholders' Equity Attributable to Noncontrolling Interest				126,980,000	137,109,000
Partners' Capital Account, Units, Converted				1,600,000
Series H Preferred Stock [Member]
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) [Line Items]
Number of Votes				100
Number of Proxies				100
Number of Votes, Depositary				1
Preferred Stock, Liquidation Preference Per Share				$ 2,500.00
Series I, J or K Preferred Stock [Member]
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) [Line Items]
Number of Votes				1,000
Number of Proxies				1,000
Number of Votes, Depositary				1
Series I Preferred Stock [Member]
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) [Line Items]
Preferred Stock, Liquidation Preference Per Share				$ 25,000.00
Series J Preferred Stock [Member]
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) [Line Items]
Preferred Stock, Liquidation Preference Per Share				$ 25,000.00
Series K Preferred Stock [Member]
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) [Line Items]
Preferred Stock, Liquidation Preference Per Share				$ 25,000.00
Depositary Share [Member]
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) [Line Items]
Preferred Stock, Liquidation Preference Per Share				$ 25.00
Convertible Units [Member]
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest				$ 41,000,000
In Addition To [Member]
Note 16 - Preferred Stock, Common Stock and Convertible Unit Transactions (Details) [Line Items]
Stock Repurchased During Period, Shares						1,635,823