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Fair Value Measurements Derivatives Observable Inputs Reconciliation (Details) (Level 2, USD $)
In Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2011
|
Jun. 30, 2010
|
Jun. 30, 2011
|
Jun. 30, 2010
|
|
|
Level 2
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| Derivatives Measured on a Recurring Basis, Observable Input Rollforward | ||||
| Beginning Balance | $ 2,657 | $ 23,709 | $ 8,309 | $ 24,859 |
| Gain (loss) included in earnings | 6,081 | 8,285 | 10,757 | 19,241 |
| Gain (loss) included in other comprehensive income | (21,673) | (6,849) | (20,697) | (16,655) |
| Transfers in and/or out of Level 2 | 0 | 0 | 0 | 0 |
| Purchases, sales, issuances, settlements | 0 | 0 | 0 | 0 |
| Ending Balance | $ 18,249 | $ 22,273 | $ 18,249 | $ 22,273 |