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v2.3.0.11

Balance Sheet Information (Details) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2011 | Jun. 30, 2010 | Jun. 30, 2011 | Jun. 30, 2010 | Dec. 31, 2010
Total available-for-sale securities |  |  |  |  |
Amortized Cost | $ 380,190,000 |  | $ 380,190,000 |  | $ 394,083,000
Gains in Accumulated Other Comprehensive Income | 316,000 |  | 316,000 |  | 97,000
Estimated Fair Value | 380,506,000 |  | 380,506,000 |  | 394,180,000
Total proceeds from sale of available-for-sale securities | 252,000,000 |  | 374,226,000 |  |
Net unrealized gain on available-for-sale securities | 200,000 |  | 200,000 |  |
Total proceeds from available-for-sale securities matured |  | 120,000,000 |  | 160,141,000 |
Estimated fair value of contractual maturities of available-for-sale debt securities |  |  |  |  |
Due in one year or less | 146,462,000 |  | 146,462,000 |  |
Due in 1-2 years | 234,044,000 |  | 234,044,000 |  |
Total investments in debt securities | 380,506,000 |  | 380,506,000 |  | 394,180,000
Gross realized gains | 200,000 |  | 200,000 |  |
Commercial paper |  |  |  |  |
Total available-for-sale securities |  |  |  |  |
Amortized Cost | 102,850,000 |  | 102,850,000 |  | 128,527,000
Gains in Accumulated Other Comprehensive Income | 26,000 |  | 26,000 |  | 61,000
Estimated Fair Value | 102,876,000 |  | 102,876,000 |  | 128,588,000
Estimated fair value of contractual maturities of available-for-sale debt securities |  |  |  |  |
Total investments in debt securities | 102,876,000 |  | 102,876,000 |  | 128,588,000
FDIC insured corporate bonds |  |  |  |  |
Total available-for-sale securities |  |  |  |  |
Amortized Cost | 127,856,000 |  | 127,856,000 |  | 129,353,000
Gains in Accumulated Other Comprehensive Income | 217,000 |  | 217,000 |  | 24,000
Estimated Fair Value | 128,073,000 |  | 128,073,000 |  | 129,377,000
Estimated fair value of contractual maturities of available-for-sale debt securities |  |  |  |  |
Total investments in debt securities | 128,073,000 |  | 128,073,000 |  | 129,377,000
Treasury bills |  |  |  |  |
Total available-for-sale securities |  |  |  |  |
Amortized Cost | 149,484,000 |  | 149,484,000 |  | 136,203,000
Gains in Accumulated Other Comprehensive Income | 73,000 |  | 73,000 |  | 12,000
Estimated Fair Value | 149,557,000 |  | 149,557,000 |  | 136,215,000
Estimated fair value of contractual maturities of available-for-sale debt securities |  |  |  |  |
Total investments in debt securities | $ 149,557,000 |  | $ 149,557,000 |  | $ 136,215,000

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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + Details
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