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SHAREHOLDERS' EQUITY (DETAILS 4) (USD $)
In Thousands, except Share data, unless otherwise specified |
12 Months Ended | 1 Months Ended | 6 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Jun. 30, 2013
Series A 7.25% Preferred Shares [Member]
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Dec. 17, 2012
Series A 7.25% Preferred Shares [Member]
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Mar. 31, 2012
Series A 7.25% Preferred Shares [Member]
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Oct. 31, 2005
Series A 7.25% Preferred Shares [Member]
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Jun. 30, 2013
Series A 7.25% Preferred Shares [Member]
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Jul. 15, 2013
Series A 7.25% Preferred Shares [Member]
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Dec. 31, 2012
Series A 7.25% Preferred Shares [Member]
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Dec. 31, 2011
Series A 7.25% Preferred Shares [Member]
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Apr. 30, 2013
Series B 7.50% Preferred Shares [Member]
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Nov. 30, 2005
Series B 7.50% Preferred Shares [Member]
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Dec. 31, 2013
Series B 7.50% Preferred Shares [Member]
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Dec. 31, 2012
Series B 7.50% Preferred Shares [Member]
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Dec. 31, 2011
Series B 7.50% Preferred Shares [Member]
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Jan. 15, 2013
Series C 6.875% Preferred Shares [Member]
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Mar. 31, 2012
Series C 6.875% Preferred Shares [Member]
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Dec. 31, 2013
Series C 6.875% Preferred Shares [Member]
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Dec. 31, 2012
Series C 6.875% Preferred Shares [Member]
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Mar. 03, 2014
Series D 5.50% Preferred Shares [Member]
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May 31, 2013
Series D 5.50% Preferred Shares [Member]
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Dec. 31, 2013
Series D 5.50% Preferred Shares [Member]
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| Class of Stock [Line Items] | |||||||||||||||||||||||
| Preferred shares, aggregate liquidation value issued | $ 250,000 | $ 250,000 | $ 400,000 | $ 225,000 | |||||||||||||||||||
| Preferred shares, dividend rate | 7.25% | 7.50% | 6.875% | 5.50% | |||||||||||||||||||
| Preferred shares, aggregate liquidation preference repurchased | 100,000 | 150,000 | |||||||||||||||||||||
| Preferred shares, par value per share | $ 0.0125 | $ 0.0125 | $ 0.0125 | $ 0.0125 | $ 0.0125 | ||||||||||||||||||
| Preferred shares, liquidation preference per share | $ 25.00 | $ 25.00 | $ 100.00 | $ 25.00 | $ 25.00 | ||||||||||||||||||
| Preferred shares, redemption price per share | $ 100.00 | $ 25.00 | $ 25.00 | ||||||||||||||||||||
| Preferred shares, floating dividend rate base | 3.4525% | ||||||||||||||||||||||
| Preferred shares, dividend declared per share | $ 0.4531 | $ 0.9063 | $ 1.8125 | $ 1.8125 | $ 7.50 | $ 7.50 | $ 7.50 | $ 1.7188 | $ 1.4132 | $ 0.6875 | |||||||||||||
| Preferred shares, dividends paid per share | $ 1.3594 | $ 1.8125 | $ 1.8125 | $ 7.50 | $ 7.50 | $ 7.50 | $ 0.4297 | $ 1.7188 | $ 0.9835 | $ 0.3438 | $ 0.3438 | ||||||||||||
| Preferred shares, number of shares repurchased | 4,000,000 | 6,000,000 | 2,471,570 | ||||||||||||||||||||
| Loss on repurchase of preferred shares | 3,081 | 14,009 | 0 | 3,000 | 5,000 | 9,000 | |||||||||||||||||
| Preferred shares, number of shares outstanding | 28,430 | ||||||||||||||||||||||
| Preferred shares, aggregate liquidation value outstanding | 627,843 | 502,843 | 3,000 | 400,000 | |||||||||||||||||||
| Preferred shares, purchase price per share | $ 102.81 | ||||||||||||||||||||||
| Aggregate cash payment to acquire preferred shares | $ 100,000 | $ 404,073 | $ 0 | $ 254,000 | |||||||||||||||||||