Note 13 - Preferred Stock, Common Stock and Convertible Unit Transactions (Tables) (Outstanding Preferred Stock [Member])

3 Months Ended

Mar. 31, 2014

Outstanding Preferred Stock [Member]

Note 13 - Preferred Stock, Common Stock and Convertible Unit Transactions (Tables) [Line Items]

Schedule of Stockholders Equity [Table Text Block]

As of March 31, 2014 and December 31, 2013
Series of Preferred Stock	Shares Authorized		Shares Issued and Outstanding		Liquidation Preference		Dividend Rate			Annual Dividend per Depositary Share		Par Value
Series H		70,000		70,000	$	175,000		6.90	%	$	1.72500	$	1.00
Series I		18,400		16,000		400,000		6.00	%	$	1.50000	$	1.00
Series J		9,000		9,000		225,000		5.50	%	$	1.37500	$	1.00
Series K		8,050		7,000		175,000		5.625	%	$	1.40625	$	1.00
		105,450		102,000	$	975,000