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10. Other Income and Expenses (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Interest and investment income   $ (11,400,000) $ (8,200,000) $ (5,200,000)
Net realized gains on investments   (8,700,000) (700,000) (600,000)
Other-than-temporary impairment losses on investments   1,000,000 2,100,000 200,000
Gain (loss) on sale of property, plant and equipment - consolidated   3,800,000    
Gain (Loss) on Sale of Property Plant Equipment     (200,000) (500,000)
Miscellaneous Other (Income) Expense Items, Net   1,000,000 (1,000,000) 1,200,000
Other (income) expense, net   21,883,000 7,583,000 3,875,000
Goodwill, Written off Related to Sale of Business Unit 1,000,000 1,000,000 0 0
Clinical Diagnostics [Member]
        
Consideration for sale of building 6,400,000      
Gain (loss) on sale of property, plant and equipment - Diagnostics 4,300,000      
Goodwill, Written off Related to Sale of Business Unit $ 1,000,000   $ 0