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8. Accumulated Other Comprehensive Income (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]      
Other (income) expense, net $ (1,400,000) $ (6,450,000)  
Accumulated other comprehensive income 269,436,000   274,901,000
Other comprehensive income before reclassifications, net of tax (5,200,000)    
Reclassification from accumulated other comprehensive income, net of tax (100,000)    
Total other comprehensive income (loss) net of tax (5,300,000) 57,713,000  
Income Tax Expense (Benefit) 2,929,000 15,235,000  
Net Income (Loss) Attributable to Parent (19,499,000) (31,005,000)  
Accumulated Translation Adjustment [Member]
      
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]      
Accumulated other comprehensive income 138,300,000   173,300,000
Other comprehensive income before reclassifications, net of tax (34,800,000)    
Reclassification from accumulated other comprehensive income, net of tax (200,000)    
Total other comprehensive income (loss) net of tax (35,000,000)    
Accumulated Defined Benefit Plans Adjustment [Member]
      
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]      
Accumulated other comprehensive income (7,800,000)   (8,100,000)
Other comprehensive income before reclassifications, net of tax 300,000    
Reclassification from accumulated other comprehensive income, net of tax 0    
Total other comprehensive income (loss) net of tax 300,000    
Accumulated Net Unrealized Investment Gain (Loss) [Member]
      
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]      
Accumulated other comprehensive income 138,900,000   109,700,000
Other comprehensive income before reclassifications, net of tax 29,300,000    
Reclassification from accumulated other comprehensive income, net of tax (100,000)    
Total other comprehensive income (loss) net of tax 29,200,000    
Noncontrolling Interest [Member]
      
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]      
Accumulated other comprehensive income 0   (200,000)
Other comprehensive income before reclassifications, net of tax 0    
Reclassification from accumulated other comprehensive income, net of tax 200,000    
Total other comprehensive income (loss) net of tax 200,000    
Parent [Member]
      
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]      
Other comprehensive income before reclassifications, net of tax (5,200,000)    
Reclassification from accumulated other comprehensive income, net of tax (300,000)    
Total other comprehensive income (loss) net of tax (5,500,000)    
Accumulated Other Comprehensive Income (Loss) [Member]
      
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]      
Accumulated other comprehensive income 269,400,000   274,700,000
Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
      
Accumulated Other Comprehensive Income Loss Net Of Tax [Line Items]      
Other (income) expense, net (200,000)    
Income Tax Expense (Benefit) 100,000    
Net Income (Loss) Attributable to Parent $ (100,000)