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Details Of Certain Accounts (Other Current Assets) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Details Of Certain Accounts [Abstract] |  |  |
Other receivables | $ 1,086 |  | $ 618
Prepaid insurance | 11,999 |  | 12,608
Other prepaids | 11,751 |  | 11,328
Spare parts inventory | 2,480 |  | 1,677
Income tax receivable | 14,201 | [1] |
Current deferred tax assets | 43,942 |  | 41,449
Hedging assets | 5,946 |  | 21,579
Other | 5,529 |  | 4,325
Total other current assets | $ 96,934 |  | $ 93,584
[1] | Reflects the total amount of estimated tax receivable in excess of the estimated current income tax liability.

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