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12. Legal Proceedings 12. Contingent Liability (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Loss Contingencies [Line Items]    
Estimated loss contingency $ 39,800,000 $ 30,000,000
Loss Contingency Accrual, Provision 8,000,000  
Including Interest [Member]
    
Loss Contingencies [Line Items]    
Estimated loss contingency 43,000,000  
Interest Expense [Member]
    
Loss Contingencies [Line Items]    
Loss Contingency Accrual, Provision (1,800,000)  
Selling, General and Administrative Expenses [Member]
    
Loss Contingencies [Line Items]    
Loss Contingency Accrual, Provision 9,800,000  
Accrued Interest [Member]
    
Loss Contingencies [Line Items]    
Estimated loss contingency $ 3,200,000