Quarterly report pursuant to Section 13 or 15(d)

Investments And Restricted Deposits (Gross Recorded Realized Gains And Losses On Investments) (Details)

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Investments And Restricted Deposits (Gross Recorded Realized Gains And Losses On Investments) (Details) (USD $)
In Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Investments And Restricted Deposits [Abstract]        
Gains $ 107 $ 2,310 $ 240 $ 6,027
Losses (1) (23) (27) (268)
Impairment of investment   (5,531)   (5,531)
Net realized (losses) gains $ 106 $ (3,244) $ 213 $ 228