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Fair Value Measurements (Reconciliation Of Marketable Securities Measured At Fair Value Using Significant Unobservable Inputs (Level 3)) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2012
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Mar. 31, 2011
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| Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, Sales, Issuances, Settlements [Abstract] | ||
| Balance, beginning of period | $ 71,693 | $ 80,365 |
| Total realized and unrealized gains (losses) included in, interest and other income, net | (40,096) | 1,246 |
| Total realized and unrealized gains (losses) included in other comprehensive income, net | 33,094 | 2,160 |
| Sales of marketable securities | (16,523) | (20,830) |
| Transfers into Level 3 | 0 | 53,882 |
| Balance, end of period | $ 48,168 | $ 116,823 |
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- Definition
This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings or resulted in a change in net asset value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in other comprehensive income (a separate component of shareholders' equity). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This element represents purchases, sales, issuances, and settlements (net) which have taken place during the period in relation to assets measured at fair value on a recurring basis using unobservable inputs (Level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
This element represents [net] transfers in to and out of assets measured at fair value on a recurring basis using unobservable inputs (Level 3) which have taken place during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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