Investments (Available-For-Sale And Held-To-Maturity Securities) (Details) (USD $)	Sep. 30, 2011		Dec. 31, 2010
Investment [Line Items]
Available-for-sale securities, Gross Unrealized Gains	$ 1,000		$ 1,000
Available-for-sale securities, Gross Unrealized Losses	(1,000)
Available-for-sale securities, Estimated Fair Value			1,000
Cost or Amortized Cost, Total	49,215,000		21,350,000
Gross Unrealized Gains, Total	1,000		1,000
Gross Unrealized Losses, Total	(1,000)		(1,000)
Estimated Fair Value, Total	49,215,000		21,350,000
Trading securities held by the company	0		0
Bank Deposits And Certificates Of Deposit [Member] | Fixed Maturities [Member]
Investment [Line Items]
Held-to-maturity securities, Cost or Amortized Cost	49,215,000		21,350,000
Held-to-maturity securities, Gross Unrealized Losses			(1,000)
Held-to-maturity securities, Estimated Fair Value	49,215,000		21,349,000
Equity Securities [Member]
Investment [Line Items]
Available-for-sale securities, Gross Unrealized Gains	1,000	[1]	1,000	[1]
Available-for-sale securities, Gross Unrealized Losses	(1,000)	[1]
Available-for-sale securities, Estimated Fair Value			1,000	[1]
Fixed Maturities [Member]
Investment [Line Items]
Held-to-maturity securities, Cost or Amortized Cost	49,215,000		21,350,000
Held-to-maturity securities, Gross Unrealized Losses			(1,000)
Held-to-maturity securities, Estimated Fair Value	$ 49,215,000		$ 21,349,000

[1] Equity securities at September 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.