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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% |  |  |  |  |

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section F Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Article 5 -Subsection 19, 20, 22 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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