Other Balance Sheet Items (Prepaid Expenses And Other Current Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Balance Sheet Related Disclosures [Abstract]
Prepaid expenses	$ 12,272	$ 15,413
Non-trade receivables	15,231	15,056
Deferred Finance Costs, Current, Net	10,799	0
Other	547	326
Total prepaid expenses and other current assets	$ 38,849	$ 30,795

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Net amount of current deferred finance costs capitalized at the end of the reporting period.

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Carrying amounts due as of the balance sheet date of the sum of amounts receivable other than from customers.

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Aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

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The total of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer, and the aggregate carrying amount of current assets, as of the balance sheet date, not separately presented elsewhere in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

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Sum of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer.

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