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Note 14 - Stockholders' Equity (Details) (USD $)
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0 Months Ended | 1 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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May 03, 2013
|
Oct. 09, 2012
|
Sep. 04, 2012
|
Aug. 21, 2012
|
Jul. 17, 2012
|
Dec. 06, 2011
|
May 31, 2012
|
Dec. 16, 2011
|
Jul. 02, 2011
|
Jul. 14, 2011
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2013
Ordinary Income Per Share [Member]
|
Dec. 31, 2012
Ordinary Income Per Share [Member]
|
Dec. 31, 2013
Return Of Capital Per Share [Member]
|
Dec. 31, 2012
Return Of Capital Per Share [Member]
|
Dec. 31, 2013
Equity Distribution Agreement with JMP Securities [Member]
|
Jun. 11, 2012
Equity Distribution Agreement with JMP Securities [Member]
|
Dec. 31, 2013
Series B Preferred Stock [Member]
|
Dec. 31, 2012
Series B Preferred Stock [Member]
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| Note 14 - Stockholders' Equity (Details) [Line Items] | |||||||||||||||||||||||||||||||||
| Preferred Stock, Shares Authorized (in Shares) | 200,000,000 | 3,450,000 | 3,450,000 | ||||||||||||||||||||||||||||||
| Preferred Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01 | $ 0.01 | ||||||||||||||||||||||||||||||
| Preferred Stock, Shares Issued (in Shares) | 3,000,000 | 0 | 3,000,000 | 0 | |||||||||||||||||||||||||||||
| Preferred Stock, Shares Outstanding (in Shares) | 3,000,000 | 0 | 3,000,000 | 0 | |||||||||||||||||||||||||||||
| Stock Issued During Period, Shares, New Issues (in Shares) | 13,600,000 | 15,525,000 | 1,500,000 | 10,000,000 | 5,175,000 | 2,400,000 | 3,163,000 | 360,000 | 1,500,000 | 225,000 | 827,313 | 3,000,000 | |||||||||||||||||||||
| Preferred Stock, Dividend Rate, Percentage | 7.75% | 7.75% | 7.75% | ||||||||||||||||||||||||||||||
| Preferred Stock, Liquidation Preference Per Share | $ 25 | $ 25 | |||||||||||||||||||||||||||||||
| Proceeds from Issuance of Preferred Stock and Preference Stock (in Dollars) | $ 72,637,000 | $ 72,400,000 | |||||||||||||||||||||||||||||||
| Special Dividend | $ 0.10 | ||||||||||||||||||||||||||||||||
| Common Stock Taxable Dividends Per Share | $ 1.08 | $ 1.06 | $ 1.00 | $ 0.81 | $ 0.92 | $ 0.27 | $ 0.14 | ||||||||||||||||||||||||||
| Common Stock, Value, Subscriptions (in Dollars) | 25,000,000 | ||||||||||||||||||||||||||||||||
| Proceeds from Issuance of Common Stock (in Dollars) | $ 94,434,000 | [1] | $ 104,144,000 | [1] | $ 9,765,000 | [1] | $ 64,892,000 | [1] | $ 33,150,000 | [1] | $ 15,422,000 | [1] | $ 20,031,000 | [1] | $ 2,360,000 | [1] | $ 10,325,000 | [1] | $ 1,603,000 | [1] | $ 100,551,000 | $ 232,668,000 | $ 30,382,000 | $ 5,800,000 | |||||||||
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