Certain Balance Sheet Components Accounts Receivable, Net (Details) (USD $) In Thousands | Sep. 30, 2011 | Jun. 30, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Dec. 31, 2009 |
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| Accounts Receivable, Net (Line Items] | ||||||
| Trade receivables, net of allowance | $ 340,641 | $ 328,811 | ||||
| Unbilled receivables | 36,466 | 42,851 | ||||
| Total accounts receivable, net | 377,107 | 371,662 | ||||
| Allowance for doubtful accounts | $ 7,452 | $ 8,980 | $ 9,045 | $ 5,766 | $ 6,298 | $ 6,339 |
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- Definition Trade receivables for amounts due from customers or clients, within one year of the balance sheet date for goods or services that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.
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- Definition The amount due for services rendered or products shipped and recognized as revenue in conformity with revenue recognition criteria, but not yet billed.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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