Debt (Details 2) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2012
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Dec. 31, 2011
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Carrying amount and estimated fair value of debt | ||||||
Debt, net | $ 2,169,315 | $ 2,426,303 | ||||
4.25% Exchangeable Senior Notes
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Carrying amount and estimated fair value of debt | ||||||
Debt, net | 230,000 | [1] | 227,283 | [1] | ||
Carrying Amount
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Carrying amount and estimated fair value of debt | ||||||
Variable-rate debt | 959,045 | 1,141,549 | ||||
Debt, net | 2,169,315 | 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 | 230,000 | 227,283 | ||||
Carrying Amount | Other fixed-rate debt
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Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | 980,270 | 1,057,471 | ||||
Total Estimated Fair Value
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Carrying amount and estimated fair value of debt | ||||||
Variable-rate debt | 959,944 | 1,139,856 | ||||
Debt, net | 2,193,256 | 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 | 240,335 | 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 | $ 992,977 | $ 1,054,424 | ||||
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