Note 11 - Capital Resources (Detail) (USD $)	0 Months Ended	12 Months Ended			24 Months Ended
	Dec. 05, 2008	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2004	Sep. 29, 2006
Proceeds from Issuance of Common Stock				$ 124,928,000
Stock Issued During Period, Shares, New Issues (in Shares)				15,028,409
Sale of Stock, Price Per Share (in Dollars per share)				$ 8.80
Proceeds from Issuance of Preferred Stock and Preference Stock (in Dollars)	258,000,000				8,600,000
Preferred Stock, Dividend Rate, Percentage					7.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)		1,846,374
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)		20.96
Warrants and Rights Outstanding		38,700,000
Subordinated Debt						50,000,000
Interest Expense, Subordinated Notes and Debentures		3,200,000	3,000,000	3,100,000
Gross Proceeds [Member]
Proceeds from Issuance of Common Stock				132,300,000
Net of Issuance Costs [Member]
Proceeds from Issuance of Common Stock				$ 124,900,000
Subordinated Debt Obligations [Member]
Debt, Weighted Average Interest Rate		3.61%	3.88%
First Five Years [Member]
Preferred Stock, Dividend Rate, Percentage	5.00%
After Five Years [Member]
Preferred Stock, Dividend Rate, Percentage	9.00%