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10. Other Income and Expenses (Details) (USD $)	3 Months Ended
10. Other Income and Expenses (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Interest and investment income	$ (1,300,000)	$ (1,000,000)
Net realized gains on investments	(200,000)	(6,500,000)
Miscellaneous other expense items, net	100,000	1,000,000
Other (income) expense, net	$ (1,400,000)	$ (6,450,000)

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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