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Balance Sheet Components (Prepaid Expenses and Other Current Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Prepaid expenses and other current assets [Abstract]
Intra-period deferred tax asset	$ 24,271	$ 0
Prepaid service contracts - current portion	3,767	4,727
Prepaid income taxes	1,956	1,952
Other prepaid expenses and current assets	7,079	7,191
Total prepaid expenses and other current assets	$ 37,073	$ 13,870

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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- Definition

Carrying amount as of the balance sheet date of payments made in advance for income and other taxes, which will be charged against earnings within one year or the normal operating cycle, if longer.

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