Investments (Amortized Cost And Estimated Fair Value Of Debt Securities By Contractual Maturity) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Investments [Abstract]
Securities Available-for-Sale, Due in one year or less, Cost	$ 6,024
Securities Available-for-Sale, Due after one year through five years, Cost	23,148
Securities Available-for-Sale, Due after five years through ten years, Cost	41,376
Securities Available-for-Sale, Due after ten years, Cost	253,098
Securities Available-for-Sale, Cost, Total	323,646
Securities Available-for-Sale, Due in one year or less, Estimated Fair Value	6,033
Securities Available-for-Sale, Due after one year through five years, Estimated Fair Value	23,475
Securities Available-for-Sale, Due after five years through ten years, Estimated Fair Value	42,611
Securities Available-for-Sale, Due after ten years, Estimated Fair Value	250,278
Securities Available-for-Sale, Estimated Fair Value, Total	322,397
Securities Held-to-Maturity, Due after ten years, Cost	4,293
Securities Held-to-Maturity, Cost, Total	4,293
Securities Held-to-Maturity, Due after ten years, Estimated Fair Value	5,951
Securities Held-to-Maturity, Estimated Fair Value, Total	$ 5,951