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Investments (Details) Available for Sale Investments (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
Schedule of Available-for-sale Securities      
Cost, Total $ 37,368 $ 37,368 $ 41,277
Gross Unrealized Gains 3,559 3,559 2,999
Gross Unrealized Losses (494) (494) (1,170)
Fixed maturities, Carrying Value 10,617 10,617 15,205
Marketable equity securities, Carrying Value 29,816 29,816 27,901
Total available-for-sale investments 40,433 40,433 43,106
Available-for-sale Securities, Continuous Unrealized Loss Position      
Less than 12 months, Fair Value 1,987 1,987 6,576
Less than 12 months, Gross Unrealized Loss 76 76 355
Greater than 12 months, Fair Value 7,896 7,896 5,575
Greater than 12 months, Gross Unrealized Loss 418 418 815
Marketable Equity Securities
     
Schedule of Available-for-sale Securities      
Marketable equity securities, Cost 27,137 27,137 26,575
Gross Unrealized Gains 3,170 3,170 2,440
Gross Unrealized Losses (491) (491) (1,114)
Marketable equity securities, Carrying Value 29,816 29,816 27,901
Available-for-sale Securities, Continuous Unrealized Loss Position      
Less than 12 months, Fair Value 1,987 1,987 6,510
Less than 12 months, Gross Unrealized Loss 76 76 354
Greater than 12 months, Fair Value 5,736 5,736 2,757
Greater than 12 months, Gross Unrealized Loss 415 415 760
Other-than-temporary impairment charges on marketable equity securities 76 998  
Fixed Maturities Total
     
Schedule of Available-for-sale Securities      
Fixed maturities, Cost     14,702
Gross Unrealized Gains     559
Gross Unrealized Losses     (56)
Fixed maturities, Carrying Value     15,205
US Treasury Securities
     
Schedule of Available-for-sale Securities      
Fixed maturities, Cost     831
Gross Unrealized Losses       
Fixed maturities, Carrying Value     831
Corporate Bonds
     
Schedule of Available-for-sale Securities      
Fixed maturities, Cost 10,231 10,231 13,871
Gross Unrealized Gains 389 389 559
Gross Unrealized Losses (3) (3) (56)
Fixed maturities, Carrying Value 10,617 10,617 14,374
Available-for-sale Securities, Continuous Unrealized Loss Position      
Less than 12 months, Fair Value     66
Less than 12 months, Gross Unrealized Loss     1
Greater than 12 months, Fair Value 2,160 2,160 2,818
Greater than 12 months, Gross Unrealized Loss $ 3 $ 3 $ 55