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Debt (Summary Of Debt) (Details) (USD $)
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12 Months Ended | 12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2010
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Jun. 30, 2010
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Dec. 31, 2009
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Dec. 31, 2010
Parent [Member]
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Dec. 31, 2009
Parent [Member]
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Dec. 31, 2010
Revolving Credit Facilities [Member]
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Dec. 31, 2009
Revolving Credit Facilities [Member]
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Dec. 31, 2010
2006 Senior Unsecured Notes [Member]
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Dec. 31, 2009
2006 Senior Unsecured Notes [Member]
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Dec. 31, 2010
Exchangeable Senior Notes [Member]
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Dec. 31, 2009
Exchangeable Senior Notes [Member]
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Apr. 30, 2010
Exchangeable Senior Notes [Member]
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Dec. 31, 2010
Term Loans [Member]
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Dec. 31, 2009
Term Loans [Member]
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| Debt Instrument [Line Items] | ||||||||||||||
| Principal amount | $ 137,200,000 | $ 125,000,000 | $ 125,000,000 | $ 91,175,000 | $ 220,000,000 | $ 157,683,000 | $ 102,743,000 | |||||||
| Unamortized discount | (2,585,000) | (8,265,000) | (1,303,000) | |||||||||||
| Debt instrument, net | 88,590,000 | 211,735,000 | 156,380,000 | 102,743,000 | ||||||||||
| Total senior notes available | $ 369,970,000 | $ 125,000,000 | $ 576,678,000 | $ 369,970,000 | $ 576,678,000 | |||||||||
| Unsecured senior notes, interest rate | 9.25% | |||||||||||||
| Interest rate, minimum | 7.333% | 7.333% | 6.125% | 6.125% | ||||||||||
| Interest rate, maximum | 7.871% | 7.871% | 9.25% | 9.25% | ||||||||||
| Interest rate terms | Variable | Variable | Various | Various | ||||||||||