Note 13 - Preferred Stock (Details) - Outstanding Preferred Stock (USD $) In Thousands, except Share data, unless otherwise specified								9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Series H, I, J & K Preferred Stock [Member] Series H Preferred Stock [Member]	Sep. 30, 2013 Series H, I, J & K Preferred Stock [Member] Series I Preferred Stock [Member]	Sep. 30, 2013 Series H, I, J & K Preferred Stock [Member] Series J Preferred Stock [Member]	Sep. 30, 2013 Series H, I, J & K Preferred Stock [Member] Series K Preferred Stock [Member]	Sep. 30, 2013 Series H, I, J & K Preferred Stock [Member]	Sep. 30, 2013 Series H Preferred Stock [Member]	Sep. 30, 2013 Series I Preferred Stock [Member]	Sep. 30, 2013 Series J Preferred Stock [Member]	Sep. 30, 2013 Series K Preferred Stock [Member]
Class of Stock [Line Items]
Shares Authorized	5,961,200	5,961,200	70,000	18,400	9,000	8,050	105,450
Shares Issued and Outstanding	102,000	102,000						70,000	16,000	9,000	7,000
Liquidation Preference (in Dollars)	$ 975,000	$ 975,000						$ 175,000	$ 400,000	$ 225,000	$ 175,000
Dividend Rate								6.90%	6.00%	5.50%	5.625%
Annual Dividend per Depositary Share (in Dollars per share)								$ 1.72500	$ 1.50000	$ 1.37500	$ 1.40625
Par Value (in Dollars per share)	$ 1.00	$ 1.00						$ 1.00	$ 1.00	$ 1.00	$ 1.00