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9. Other Income and Expenses (Details) (USD $)	3 Months Ended
9. Other Income and Expenses (Details) (USD $)	Mar. 31, 2012	Mar. 31, 2011
Interest and investment income	$ (1,000,000)	$ (700,000)
Realized gains on investments	(6,500,000)	(200,000)
Miscellaneous other (income) expense items	1,000,000	(100,000)
Other (income) expense, net	$ (6,450,000)	$ (951,000)

Income derived from investments in debt and equity securities and on cash and cash equivalents. Interest income represents earnings which reflect the time value of money or transactions in which the payments are for the use or forbearance of money. Dividend income represents a distribution of earnings to shareholders by investee companies.

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