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Note 16 - Stockholders' Equity (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2013 | Mar. 31, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Note 16 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | $ 1,539,422,000 |  |  | $ 1,539,422,000 |  | $ 1,629,504,000
Increase (Decrease) in Retained Earnings |  |  |  | (90,100,000) |  |
Percentage Change in Retained Earnings |  |  |  | 5.50% |  |
Available-for-sale Securities, Gross Unrealized Loss |  | 15,500,000 |  | 52,950,000 |  | 14,150,000
Net Income (Loss) Attributable to Parent | 29,916,000 |  | 29,861,000 | 58,763,000 | 58,774,000 |
Preferred Stock Redemption Premium |  | 1,300,000 |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |
Note 16 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Stock Redeemed or Called During Period, Value |  | 129,000,000 |  |  |  |
Percent of Preferred Stock Redeemed |  | 50.00% |  |  |  |
Approximation [Member] |  |  |  |  |  |
Note 16 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |
Net Income (Loss) Attributable to Parent |  | $ 59,100,000 |  |  |  |

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- Definition Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition The excess of (1) fair value of the consideration transferred to the holders of the preferred stock over (2) the carrying amount of the preferred stock in the registrant's balance sheet, during the accounting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section S99 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27010884&loc=d3e42851-122695 + Details
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