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Equity Transactions (Details) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified |
2 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 36 Months Ended | 12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Feb. 24, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2010
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Sep. 30, 2010
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Jun. 30, 2010
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Mar. 31, 2010
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Jun. 30, 2011
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Jun. 30, 2010
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Sep. 30, 2011
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Sep. 30, 2010
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Feb. 24, 2012
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Mar. 30, 2011
Convertible Debt [Member]
Equity [Member]
|
Mar. 29, 2011
Convertible Debt [Member]
Equity [Member]
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Dec. 31, 2011
Note Warrant [Member]
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Dec. 31, 2011
Note Warrant2 [Member]
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| Class of Stock [Line Items] | |||||||||||||||||||||
| Stock Repurchase Program, Authorized Amount | $ 100,000,000 | ||||||||||||||||||||
| Stock Repurchased During Period, Shares | 0.6 | 0 | 1.0 | 1.6 | |||||||||||||||||
| Stock Repurchased During Period, Value | 23,600,000 | 25,000,000 | 48,600,000 | ||||||||||||||||||
| Common Stock, Dividends, Per Share, Declared | $ 0.10 | $ 0.10 | $ 0.10 | $ 0.10 | $ 0.10 | $ 0.00 | $ 0.00 | $ 0.00 | $ 0.40 | $ 0.10 | $ 0.00 | ||||||||||
| Dividends, Common Stock, Cash | (4,570,000) | (4,549,000) | (4,540,000) | (4,535,000) | (4,526,000) | 0 | 0 | 0 | (9,075,000) | 0 | (13,624,000) | 0 | (18,194,000) | 4,526,000 | |||||||
| Class of Warrant or Right, Outstanding | 4.0 | 4.0 | 0.5 | 3.5 | |||||||||||||||||
| Derivative, Price Risk Option Strike Price | $ 66.3528 | ||||||||||||||||||||
| Proceeds from Issuance of Warrants | $ 31,740,000 | $ 0 | $ 0 | $ 27,600,000 | $ 4,100,000 | ||||||||||||||||