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Debt (Details 2) (USD $)
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12 Months Ended | ||
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Dec. 31, 2011
Y
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Dec. 31, 2010
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Dec. 31, 2009
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| Schedule on basis of which debt matures | |||
| 2012 | $ 66,063,000 | ||
| 2013 | 163,003,000 | ||
| 2014 | 820,780,000 | ||
| 2015 | 806,104,000 | ||
| 2016 | 278,642,000 | ||
| Thereafter | 303,879,000 | ||
| Total | 2,438,471,000 | ||
| Debt maturing in 2012 that may be extended for one year | 16,800,000 | ||
| Extension option period for portion of debt maturing in 2012 (in years) | 1 | ||
| Debt maturing in 2013 that may be extended for one year | 17,900,000 | ||
| Extension option period for portion of debt maturing in 2013 (in years) | 1 | ||
| Debt maturing in 2014 that may be extended for one year | 662,000,000 | ||
| Extension option period for portion of debt maturing in 2014 (in years) | 1 | ||
| Debt maturing in 2015 that may be extended for one year | 405,600,000 | ||
| Extension option period for portion of debt maturing in 2015 (in years) | 1 | ||
| Net discounts | 12,200,000 | ||
| Capitalized interest costs | $ 17,400,000 | $ 16,500,000 | $ 15,500,000 |
| X | ||||||||||
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- Definition
The portion of the debt instruments which will mature in year four following the date of the latest balance sheet presented in the financial statements that may be extended for a one-year period at the borrower's option, subject to certain conditions. No definition available.
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- Definition
Represents the period over which a portion of the debt instruments which will mature in year four following the date of the latest balance sheet presented in the financial statements may be extended at the option of the entity, subject to certain conditions. No definition available.
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| X | ||||||||||
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- Definition
The portion of the debt instruments which will mature in year one following the date of the latest balance sheet presented in the financial statements that may be extended for a one-year period at the borrower's option, subject to certain conditions. No definition available.
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- Definition
Represents the period over which a portion of the debt instruments which will mature in year one following the date of the latest balance sheet presented in the financial statements may be extended at the option of the entity, subject to certain conditions. No definition available.
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- Definition
The portion of the debt instruments which will mature in year three following the date of the latest balance sheet presented in the financial statements that may be extended for a one-year period at the borrower's option, subject to certain conditions. No definition available.
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| X | ||||||||||
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- Definition
Represents the period over which a portion of the debt instruments which will mature in year three following the date of the latest balance sheet presented in the financial statements may be extended at the option of the entity, subject to certain conditions. No definition available.
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| X | ||||||||||
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- Definition
The portion of the debt instruments which will mature in year two following the date of the latest balance sheet presented in the financial statements that may be extended for a one-year period at the borrower's option, subject to certain conditions. No definition available.
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| X | ||||||||||
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- Definition
Represents the period over which a portion of the debt instruments which will mature in year two following the date of the latest balance sheet presented in the financial statements may be extended at the option of the entity, subject to certain conditions. No definition available.
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| X | ||||||||||
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- Definition
Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of interest that was capitalized during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of long-term debt maturities after year five following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of long-term debt maturing within the next twelve months following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of long-term debt maturing in year five following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of long-term debt maturing in year four following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of long-term debt maturing in year three following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of long-term debt maturing in year two following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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