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Financial Instruments - Interest Rate Swaps Designated as Cash Flow Hedges (Details) (USD $)
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3 Months Ended | 9 Months Ended | 2 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2011
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Sep. 30, 2012
Interest Rate Derivatives
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Sep. 30, 2012
Interest Rate Derivatives
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Sep. 30, 2011
Interest Rate Derivatives
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Sep. 30, 2012
Interest Rate Derivatives
Cash Flow Hedging
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Sep. 30, 2012
Minimum
Interest Rate Derivatives
Cash Flow Hedging
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Sep. 30, 2012
Maximum
Interest Rate Derivatives
Cash Flow Hedging
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Sep. 30, 2012
Maximum
Interest Rate Derivatives
Cash Flow Hedging
Designated as Hedging Instrument
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Sep. 30, 2012
Other current liabilities
Interest Rate Derivatives
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Dec. 31, 2011
Other current liabilities
Interest Rate Derivatives
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Sep. 30, 2012
Other non-current liabilities
Interest Rate Derivatives
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Dec. 31, 2011
Other non-current liabilities
Interest Rate Derivatives
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||||||||||
| Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net | $ 0 | $ (29,676,000) | $ (30,726,000) | $ 0 | ||||||||
| Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | 0 | 0 | 0 | 0 | ||||||||
| Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net | 0 | 0 | 0 | 0 | ||||||||
| Derivative Assets (Liabilities), at Fair Value, Net | (292,000) | 0 | (29,384,000) | 0 | ||||||||
| Percentage of Debt Hedged by Interest Rate Derivatives | 75.00% | |||||||||||
| Notional Amount of Interest Rate Derivatives | $ 20,000,000 | $ 2,900,000,000 | ||||||||||
| Derivative, Inception Date | Aug. 14, 2012 | |||||||||||
| Derivative, Maturity Date | Jul. 31, 2019 | |||||||||||
| Derivative, Average Fixed Interest Rate | 1.98% | |||||||||||
| Derivative, Description of Variable Rate Basis | One-month LIBOR | |||||||||||