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9. Other Income and Expenses (Details) (USD $)	3 Months Ended		6 Months Ended
9. Other Income and Expenses (Details) (USD $)	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest and investment income	$ (5,900,000)	$ (4,900,000)	$ (6,900,000)	$ (5,600,000)
Net realized (gains) losses on investments	(1,000,000)	100,000	(7,400,000)	(200,000)
Miscellaneous other expense items	200,000	400,000	1,100,000	400,000
Other (income) expense, net	$ (6,731,000)	$ (4,418,000)	$ (13,181,000)	$ (5,369,000)

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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