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Investments (Schedule Of Fair Value Method Investments, Balance Sheets And Income Statements) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012 | Dec. 31, 2011
Cash & cash equivalents | $ 42,604 | $ 44,167 | $ 42,604 | $ 44,167 | $ 48,822 | $ 68,939
Other long-term assets | 47,350 |  | 47,350 |  | 49,559 |
Total assets | 793,294 |  | 793,294 |  | 783,165 |
Long term debt, net of discount | 134,000 |  | 134,000 |  | 128,000 |
Equity | 376,705 |  | 376,705 |  | 372,252 |
Total liabilities and shareholders' equity | 793,294 |  | 793,294 |  | 783,165 |
Expenses and other, net | (229,600) | (200,842) | (687,971) | (616,567) |  |
Income tax (expense) benefit | (2,937) | (4,476) | (12,185) | (11,318) |  |
Net income | 6,978 | 7,427 | 12,545 | 17,778 |  |
Intelliject [Member] |  |  |  |  |  |
Cash & cash equivalents | 32,198 |  | 32,198 |  | 53,288 |
Other current assets | 9,289 |  | 9,289 |  | 686 |
Patents | 2,331 |  | 2,331 |  | 2,152 |
Other long-term assets | 9,737 |  | 9,737 |  | 4,278 |
Total assets | 53,555 |  | 53,555 |  | 60,404 |
Long term debt, current portion | 3,997 |  | 3,997 |  |  |
Other current liabilities | 4,242 |  | 4,242 |  | 13,405 |
Non-current liabilities | 2,895 |  | 2,895 |  | 1,449 |
Long term debt, net of discount | 10,766 |  | 10,766 |  | 14,696 |
Redeemable preferred stock | 21,724 |  | 21,724 |  | 20,995 |
Equity | 9,931 |  | 9,931 |  | 9,859 |
Total liabilities and shareholders' equity | 53,555 |  | 53,555 |  | 60,404 |
Royalty revenues | 7,904 |  | 12,420 |  |  |
Expenses and other, net | (5,604) | (3,089) | (12,515) | (8,026) |  |
Income tax (expense) benefit | (912) | 1,209 | 322 | 3,100 |  |
Net income | $ 1,388 | $ (1,880) | $ 227 | $ (4,926) |  |

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