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Loss Reserves (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Liability for Future Policy Benefit, by Product Segment [Line Items]    
Provision for title insurance losses $ 52.2 $ 96.4
Percentage of title premiums and escrow fees 7.20% 13.90%
Current quarter rate, expected ultimate loss, percentage 7.20%  
Ultimate loss rate 6.20% 5.20%
Approximate payment for unfavorable development in Canada 4.3  
Reserve strengthening adjustment   45.3
Prior Policy Years [Member]
   
Liability for Future Policy Benefit, by Product Segment [Line Items]    
Payment for unfavorable development 7.2  
Additional provision reflecting adverse development   $ 14.6