Investments (Amortized Cost And Estimated Fair Value Of Debt Securities By Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Investments [Abstract]
Securities Available-for-Sale, Due in one year or less, Cost	$ 5,566
Securities Available-for-Sale, Due after one year through five years, Cost	24,206
Securities Available-for-Sale, Due after five years through ten years, Cost	36,483
Securities Available-for-Sale, Due after ten years, Cost	258,876
Securities Available-for-Sale, Cost, Total	325,131
Securities Available-for-Sale, Due in one year or less, Estimated Fair Value	5,581
Securities Available-for-Sale, Due after one year through five years, Estimated Fair Value	24,677
Securities Available-for-Sale, Due after five years through ten years, Estimated Fair Value	37,258
Securities Available-for-Sale, Due after ten years, Estimated Fair Value	255,268
Securities Available-for-Sale, Estimated Fair Value, Total	322,784
Securities Held-to-Maturity, Due after ten years, Cost	3,994
Securities Held-to-Maturity, Cost, Total	3,994
Securities Held-to-Maturity, Due after ten years, Estimated Fair Value	6,406
Securities Held-to-Maturity, Estimated Fair Value, Total	$ 6,406