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Investments (Available-For-Sale And Held-To-Maturity Securities) (Details) (USD $)
In Thousands
Jun. 30, 2011
Dec. 31, 2010
Available-for-sale securities, Gross Unrealized Gains $ 1 $ 1
Available-for-sale securities, Gross Unrealized Losses 1  
Available-for-sale securities, Estimated Fair Value   1
Cost or Amortized Cost, Total 44,285 21,350
Gross Unrealized Gains, Total 1 1
Gross Unrealized Losses, Total (1) (1)
Estimated Fair Value, Total 44,285 21,350
Trading securities held by the company 0 0
Bank Deposits And Certificates Of Deposit [Member] | Fixed Maturities [Member]
   
Held-to-maturity securities, Cost or Amortized Cost 44,285 21,350
Held-to-maturity securities, Gross Unrealized Losses   (1)
Held-to-maturity securities, Estimated Fair Value 44,285 21,349
Equity Securities [Member]
   
Available-for-sale securities, Gross Unrealized Gains 1 [1] 1 [1]
Available-for-sale securities, Gross Unrealized Losses 1 [1]  
Available-for-sale securities, Estimated Fair Value   1 [1]
Fixed Maturities [Member]
   
Held-to-maturity securities, Cost or Amortized Cost 44,285 21,350
Held-to-maturity securities, Gross Unrealized Losses   (1)
Held-to-maturity securities, Estimated Fair Value $ 44,285 $ 21,349
[1] Equity securities at June 30, 2011 and December 31, 2010 were comprised of the Company's investment in common shares of Neuro-Hitech, Inc. The fair value of this investment is obtained from quoted prices in an inactive market. The Company considers the market for Neuro-Hitech, Inc. shares to be inactive due to its low trading volume and infrequency of trading.