Investments (Amortized Cost And Estimated Fair Value Of Debt Securities By Contractual Maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Securities Available-for-Sale, Amortized Cost
Securities Available-for-Sale, Due in one year or less, Cost	$ 2,942
Securities Available-for-Sale, Due after one year through five years, Cost	13,908
Securities Available-for-Sale, Due after five years through ten years, Cost	29,262
Securities Available-for-Sale, Due after ten years, Cost	236,994
Securities Available-for-Sale, Cost, Total	283,106
Securities Available-for-Sale, Estimated Fair Value
Securities Available-for-Sale, Due in one year or less, Estimated Fair Value	2,948
Securities Available-for-Sale, Due after one year through five years, Estimated Fair Value	14,358
Securities Available-for-Sale, Due after five years through ten years, Estimated Fair Value	29,654
Securities Available-for-Sale, Due after ten years, Estimated Fair Value	235,677
Securities Available-for-Sale, Estimated Fair Value, Total	282,637
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount	0
Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value	0
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	0
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	0
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	0
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	0
Securities Held-to-Maturity, Amortized Cost
Securities Held-to-Maturity, Due after ten years, Cost	84,082
Securities held-to-maturity, Amortized Cost	84,082	$ 90,786
Securities Held-to-Maturity, Estimated Fair Value
Securities Held-to-Maturity, Due after ten years, Estimated Fair Value	86,561
Securities held-to-maturity, Estimated Fair Value	$ 86,561	$ 94,191