| ($ in thousands) | 2010 | 2009 |
| |
| Assets | |
| Cash and cash equivalents | $ 205,721 | $ 135,447 |
| Operating investments, at market | 243,644 | 182,153 |
| Collateral held for securities lending | 79,283 | 62,062 |
| Accounts receivable, net | 307,369 | 276,444 |
| Inventories, prepaid expenses and deferred charges | 49,999 | 47,794 |
| Contributions receivable, net | 47,301 | 57,004 |
| Notes receivable, net | 48,163 | 19,566 |
| Other assets | 12,748 | 12,044 |
| Investments held for long-term purposes | 1,563,847 | 1,414,464 |
| Property, plant and equipment, net | 1,401,038 | 1,349,270 |
| Interest in net assets of foundation | 12,370 | 11,653 |
| Investments in perpetual trusts held by others | 43,119 | 40,691 |
| Total Assets | $4,014,602 | $3,608,592 |
| Liabilities and Net Assets | |
| |
| Liabilities: | |
| Accounts payable and accrued expenses | 295,987$ | 259,230 |
| Advance receipt of sponsored research revenues | 23,129 | 26,190 |
| Deferred revenue | 51,507 | 51,306 |
| Third-party settlements payable, net | 92,567 | 62,181 |
| Securities lending liabilities | 79,283 | 63,390 |
| Accrued pension, post-retirement, post-employment obligations | 283,562 | 258,013 |
| Long-term debt | 772,951 | 643,734 |
| Asset retirement obligation | 17,907 | 17,326 |
| Refundable U.S. Government grants for student loans | 15,942 | 15,984 |
| Total Liabilities | 1,632,835 | 1,397,354 |
| | | |
| Net assets: | | |
| Unrestricted | 1,877,267 | 1,724,361 |
| Temporarily restricted | 179,572 | 178,666 |
| Permanently restricted | 324,928 | 308,211 |
| Total Net Assets | 2,381,767 | 2,211,238 |
| Total Liabilities and Net Assets | 4,014,602$ | 3,608,592 |