Available For Sale Securities (Amortized Cost And Estimated Fair Value Of Investments Classified As Available For Sale By Contractual Maturity) (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Investments [Abstract]
Due within one year, Amortized Cost	$ 125,340
Due after one year through five years, Amortized Cost	1,566
Due after five years through ten years, Amortized Cost	0
Due after ten years, Amortized Cost	0
Fixed maturities investments excluding mortgage-backed and asset-backed securities, Amortized Cost	126,906
Mortgage-backed and asset-backed securities, Amortized Cost	85,155
Total fixed maturities investments, Amortized Cost	212,061
Due within one year, Estimated Fair Value	125,422
Due after one year through five years, Estimated Fair Value	1,531
Due after five years through ten years, Estimated Fair Value	0
Due after ten years, Estimated Fair Value	0
Fixed maturities investments excluding mortgage-backed and asset-backed securities, Estimated Fair Value	126,953
Mortgage-backed and asset-backed securities, Estimated Fair Value	85,833
Total fixed maturities investments, Estimated Fair Value	$ 212,786