Debt (Details 2) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2014
|
Dec. 31, 2013
|
||||
---|---|---|---|---|---|---|
Carrying amount and estimated fair value of debt | ||||||
Carrying Value | $ 2,049,992 | $ 1,927,703 | ||||
4.25% Exchangeable Senior Notes
|
||||||
Carrying amount and estimated fair value of debt | ||||||
Carrying Value | 570 | [1] | 563 | [1] | ||
Carrying Amount
|
||||||
Carrying amount and estimated fair value of debt | ||||||
Variable-rate debt | 557,087 | 657,691 | ||||
Carrying Value | 2,049,992 | 1,927,703 | ||||
Carrying Amount | Unsecured senior notes
|
||||||
Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | 890,622 | 592,689 | ||||
Carrying Amount | 4.25% Exchangeable Senior Notes
|
||||||
Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | 570 | 563 | ||||
Carrying Amount | Other fixed-rate debt
|
||||||
Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | 601,713 | 676,760 | ||||
Total Estimated Fair Value
|
||||||
Carrying amount and estimated fair value of debt | ||||||
Variable-rate debt | 558,665 | 657,527 | ||||
Carrying Value | 2,038,378 | 1,884,473 | ||||
Total Estimated Fair Value | Unsecured senior notes
|
||||||
Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | 901,022 | 575,374 | ||||
Total Estimated Fair Value | 4.25% Exchangeable Senior Notes
|
||||||
Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | 575 | 575 | ||||
Total Estimated Fair Value | Other fixed-rate debt
|
||||||
Carrying amount and estimated fair value of debt | ||||||
Fixed-rate debt | $ 578,116 | $ 650,997 | ||||
|