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Investments (Fair Value and Gross Pre-Tax Net Unrealized Unrecognized Loss of Securities By Length of Time) (Details) (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
AFS Fair Value, Less than 12 months$ 312,047$ 524,328
AFS Unrealized Losses, Less than 12 months(23,462)[1](11,572)[1]
AFS Fair Value, 12 months or longer31,60132,905
AFS Unrealized Losses, 12 months or longer(3,952)[1](3,863)[1]
HTM Fair Value, Less than 12 months18,24427,149
HTM Unrealized (Losses) Gains, Less than 12 months(788)[1](1,346)[1]
HTM Unrecognized Gains (Losses), Less than 12 months753[2]8[2]
HTM Fair Value, 12 months or longer19,53936,626
HTM Unrealized Losses, 12 months or longer(4,997)[1](7,035)[1]
HTM Unrecognized Gains, 12 months or longer2,135[2]2,251[2]
Total AFS and HTM Fair Value, Less than 12 months330,291551,477
Total AFS and HTM Unrealized (Losses) Gains, Less than 12 months(24,250)[1](12,918)[1]
Total AFS and HTM Fair Value, 12 months or longer51,14069,531
Total AFS and HTM Unrealized Losses, 12 months or longer(8,949)[1](10,898)[1]
AFS Fixed Maturity Securities [Member]
  
AFS Fair Value, Less than 12 months226,129524,328
AFS Unrealized Losses, Less than 12 months(5,458)[1](11,572)[1]
AFS Fair Value, 12 months or longer31,60132,905
AFS Unrealized Losses, 12 months or longer(3,952)[1](3,863)[1]
AFS Fixed Maturity Securities [Member] | U.S. Government and Government Agencies [Member]
  
AFS Fair Value, Less than 12 months 3,956[3]
AFS Unrealized Losses, Less than 12 months (147)[1],[3]
AFS Fair Value, 12 months or longer 0[3]
AFS Unrealized Losses, 12 months or longer 0[1],[3]
AFS Fixed Maturity Securities [Member] | Foreign Government [Member]
  
AFS Fair Value, Less than 12 months 10,776
AFS Unrealized Losses, Less than 12 months (349)[1]
AFS Fair Value, 12 months or longer 0
AFS Unrealized Losses, 12 months or longer 0[1]
AFS Fixed Maturity Securities [Member] | Obligations of States and Political Subdivisions [Member]
  
AFS Fair Value, Less than 12 months2,12740,410
AFS Unrealized Losses, Less than 12 months(1)[1](650)[1]
AFS Fair Value, 12 months or longer1,8870
AFS Unrealized Losses, 12 months or longer(44)[1]0[1]
AFS Fixed Maturity Securities [Member] | Corporate Securities [Member]
  
AFS Fair Value, Less than 12 months182,536362,502
AFS Unrealized Losses, Less than 12 months(4,898)[1](8,784)[1]
AFS Fair Value, 12 months or longer6,7390
AFS Unrealized Losses, 12 months or longer(636)[1]0[1]
AFS Fixed Maturity Securities [Member] | Asset-backed Securities ("ABS") [Member]
  
AFS Fair Value, Less than 12 months6,20230,297
AFS Unrealized Losses, Less than 12 months(9)[1](273)[1]
AFS Fair Value, 12 months or longer1,144880
AFS Unrealized Losses, 12 months or longer(1,072)[1](66)[1]
AFS Fixed Maturity Securities [Member] | Commercial Mortgage-backed Securities ("CMBS") [Member]
  
AFS Fair Value, Less than 12 months6,3715,453
AFS Unrealized Losses, Less than 12 months(60)[1](271)[1]
AFS Fair Value, 12 months or longer10,05011,115
AFS Unrealized Losses, 12 months or longer(1,240)[1](2,652)[1]
AFS Fixed Maturity Securities [Member] | Residential Mortgage Backed Securities ("RMBS") [Member]
  
AFS Fair Value, Less than 12 months28,89370,934
AFS Unrealized Losses, Less than 12 months(490)[1](1,098)[1]
AFS Fair Value, 12 months or longer11,78120,910
AFS Unrealized Losses, 12 months or longer(960)[1](1,145)[1]
Equity Securities [Member]
  
AFS Fair Value, Less than 12 months85,9180
AFS Unrealized Losses, Less than 12 months(18,004)[1]0[1]
AFS Fair Value, 12 months or longer00
AFS Unrealized Losses, 12 months or longer0[1]0[1]
Obligations of States and Political Subdivisions [Member]
  
HTM Fair Value, Less than 12 months3,92921,036
HTM Unrealized (Losses) Gains, Less than 12 months(192)[1](381)[1]
HTM Unrecognized Gains (Losses), Less than 12 months178[2]45[2]
HTM Fair Value, 12 months or longer10,07227,855
HTM Unrealized Losses, 12 months or longer(551)[1](1,969)[1]
HTM Unrecognized Gains, 12 months or longer343[2]670[2]
Corporate Securities [Member]
  
HTM Fair Value, Less than 12 months 1,985
HTM Unrealized (Losses) Gains, Less than 12 months (434)[1]
HTM Unrecognized Gains (Losses), Less than 12 months 420[2]
HTM Fair Value, 12 months or longer 0
HTM Unrealized Losses, 12 months or longer 0[1]
HTM Unrecognized Gains, 12 months or longer 0[2]
Asset-backed Securities ("ABS") [Member]
  
HTM Fair Value, Less than 12 months0507
HTM Unrealized (Losses) Gains, Less than 12 months0[1](546)[1]
HTM Unrecognized Gains (Losses), Less than 12 months0[2](440)[2]
HTM Fair Value, 12 months or longer2,8302,931
HTM Unrealized Losses, 12 months or longer(1,060)[1](1,095)[1]
HTM Unrecognized Gains, 12 months or longer762[2]747[2]
Commercial Mortgage-backed Securities ("CMBS") [Member]
  
HTM Fair Value, Less than 12 months14,3153,621
HTM Unrealized (Losses) Gains, Less than 12 months(596)[1]15[1]
HTM Unrecognized Gains (Losses), Less than 12 months575[2](17)[2]
HTM Fair Value, 12 months or longer6,5295,745
HTM Unrealized Losses, 12 months or longer(3,348)[1](3,933)[1]
HTM Unrecognized Gains, 12 months or longer1,016[2]833[2]
Residential Mortgage Backed Securities ("RMBS") [Member]
  
HTM Fair Value, Less than 12 months00
HTM Unrealized (Losses) Gains, Less than 12 months0[1]0[1]
HTM Unrecognized Gains (Losses), Less than 12 months0[2]0[2]
HTM Fair Value, 12 months or longer10895
HTM Unrealized Losses, 12 months or longer(38)[1](38)[1]
HTM Unrecognized Gains, 12 months or longer$ 14[2]$ 1[2]
[1] Gross unrealized losses include non-OTTI unrealized amounts and OTTI losses recognized in AOCI. In addition, this column includes remaining unrealized gain or loss amounts on securities that were transferred to an HTM designation in the first quarter of 2009 for those securities that are in a net unrealized/unrecognized loss position.
[2] Unrecognized holding gains/(losses) represent fair value fluctuations from the later of: (i) the date a security is designated as HTM; or (ii) the date that an OTTI charge is recognized on an HTM security.
[3] U.S. government includes corporate securities fully guaranteed by the FDIC.