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Investments (Details 3) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Summary of securities with gross unrealized loss positions aggregated by investment category  
Gross Unrealized Loss, Less than Twelve Months $ (129)
Fair Value, Less than Twelve Months 3,622
Gross Unrealized Loss, Twelve Months or Greater (271)
Fair Value, Twelve Months or Greater 2,047
Gross Unrealized Loss, Total (400)
Fair Value, Total 5,669
Equity securities [Member]
  
Summary of securities with gross unrealized loss positions aggregated by investment category  
Gross Unrealized Loss, Less than Twelve Months (123)
Fair Value, Less than Twelve Months 2,559
Gross Unrealized Loss, Twelve Months or Greater (172)
Fair Value, Twelve Months or Greater 109
Gross Unrealized Loss, Total (295)
Fair Value, Total 2,668
Fixed-maturity securities [Member]
  
Summary of securities with gross unrealized loss positions aggregated by investment category  
Gross Unrealized Loss, Less than Twelve Months (6)
Fair Value, Less than Twelve Months 1,063
Gross Unrealized Loss, Twelve Months or Greater (99)
Fair Value, Twelve Months or Greater 1,938
Gross Unrealized Loss, Total (105)
Fair Value, Total 3,001
Corporate Bonds [Member]
  
Summary of securities with gross unrealized loss positions aggregated by investment category  
Gross Unrealized Loss, Less than Twelve Months (5)
Fair Value, Less than Twelve Months 839
Gross Unrealized Loss, Twelve Months or Greater (99)
Fair Value, Twelve Months or Greater 1,938
Gross Unrealized Loss, Total (104)
Fair Value, Total 2,777
Commercial mortgage-backed securities [Member]
  
Summary of securities with gross unrealized loss positions aggregated by investment category  
Gross Unrealized Loss, Less than Twelve Months (1)
Fair Value, Less than Twelve Months 224
Gross Unrealized Loss, Twelve Months or Greater   
Fair Value, Twelve Months or Greater   
Gross Unrealized Loss, Total (1)
Fair Value, Total $ 224