Investments (Amortized Cost And Fair Value Of Debt Securities, By Contractual Maturity) (Details) $ in Thousands	Mar. 31, 2018 USD ($)
Investments [Abstract]
Due in one year or less, Amortized cost	$ 5,174
Due after one year through five years, Amortized cost	45,530
Due after five years through ten years, Amortized cost	25,583
Due after ten years, Amortized cost	3,801
Amortized Cost Contractual Maturities Subtotal	80,088
Mortgage-backed securities, Amortized cost	54,324
Available-for-sale Securities, Debt Maturities, Amortized cost	134,412
Due in one year or less, Fair value	5,199
Due after one year through five years, Fair value	45,705
Due after five years through ten years, Fair value	25,062
Due after ten years, Fair value	3,700
Fair Value Contractual Maturities Subtotal	79,666
Mortgage-backed securities, Fair value	53,656
Available-for-sale Securities, Debt Securities, Fair Value	$ 133,322