Debt (Details 2) (USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2012
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Dec. 31, 2011
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Carrying amount and estimated fair value of debt | ||||||
Debt, net | $ 2,191,851 | $ 2,426,303 | ||||
4.25% Exchangeable Senior Notes
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Carrying amount and estimated fair value of debt | ||||||
Debt, net | 229,081 | [1] | 227,283 | [1] | ||
Carrying Amount
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Carrying amount and estimated fair value of debt | ||||||
Variable-rate debt | 948,500 | 1,141,549 | ||||
Debt, net | 2,191,851 | 2,426,303 | ||||
Carrying Amount | 4.25% Exchangeable Senior Notes
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Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | 229,081 | 227,283 | ||||
Carrying Amount | Other fixed-rate debt
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Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | 1,014,270 | 1,057,471 | ||||
Total Estimated Fair Value
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Carrying amount and estimated fair value of debt | ||||||
Variable-rate debt | 948,447 | 1,139,856 | ||||
Debt, net | 2,210,181 | 2,432,357 | ||||
Total Estimated Fair Value | 4.25% Exchangeable Senior Notes
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Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | 239,420 | 238,077 | ||||
Total Estimated Fair Value | Other fixed-rate debt
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Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | $ 1,022,314 | $ 1,054,424 | ||||
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