Securities Available For Sale (Schedule Of Maturities Distribution Of The Amortized Cost And Estimated Fair Value Of Securities Available For Sale) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Securities Available For Sale [Abstract]
Amortized Cost, Due one year of less
Amortized Cost, Due after one year through five years	5,195
Amortized Cost, Due after five years through ten years	12,860
Amortized Cost, Due after ten years	440,315
Securities Available for Sale, Amortized Cost	458,370	461,635
Estimated Fair Value, Due one year of less
Estimated Fair Value, Due after one year through five years	5,307
Estimated Fair Value, Due after five years through ten years	13,639
Estimated Fair Value, Due after ten years	451,579
Securities Available for Sale, Estimated Fair Value	$ 470,525us-gaap_AvailableForSaleSecurities	$ 450,170us-gaap_AvailableForSaleSecurities

Securities Available For Sale (Schedule Of Maturities Distribution Of The Amortized Cost And Estimated Fair Value Of Securities Available For Sale) (Details) (USD $)
In Thousands, unless otherwise specified

Dec. 31, 2014

Dec. 31, 2013

Securities Available For Sale [Abstract]

Amortized Cost, Due one year of less

Amortized Cost, Due after one year through five years

5,195us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

Amortized Cost, Due after five years through ten years

12,860us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

Amortized Cost, Due after ten years

440,315us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

Securities Available for Sale, Amortized Cost

458,370us-gaap_AvailableForSaleSecuritiesAmortizedCost

461,635us-gaap_AvailableForSaleSecuritiesAmortizedCost

Estimated Fair Value, Due one year of less

Estimated Fair Value, Due after one year through five years

5,307us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

Estimated Fair Value, Due after five years through ten years

13,639us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

Estimated Fair Value, Due after ten years

451,579us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

Securities Available for Sale, Estimated Fair Value

$ 470,525us-gaap_AvailableForSaleSecurities

$ 450,170us-gaap_AvailableForSaleSecurities

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount of available-for-sale debt securities at fair value maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year.

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing after the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount of available-for-sale debt securities at fair value maturing in the next fiscal year following the latest fiscal year.

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