Securities Available For Sale (Summary Of Securities Available For Sale) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available for sale Securities [Line Items]
Available for Sale, Amortized Cost	$ 532,125	$ 496,179
Available for Sale, Gross Unrealized Gains	5,627	11,831
Available for Sale, Gross Unrealized Losses	8,896	3,041
Available for Sale, Estimated Fair Value	528,856	504,969
US Government-Sponsored Enterprises [Member]
Schedule of Available for sale Securities [Line Items]
Available for Sale, Amortized Cost	330,635	304,106
Available for Sale, Gross Unrealized Gains	2,682	5,042
Available for Sale, Gross Unrealized Losses	4,865	2,155
Available for Sale, Estimated Fair Value	328,452	306,993
US Government Agencies [Member]
Schedule of Available for sale Securities [Line Items]
Available for Sale, Amortized Cost	76,722	78,408
Available for Sale, Gross Unrealized Gains	797	1,269
Available for Sale, Gross Unrealized Losses	613	547
Available for Sale, Estimated Fair Value	76,906	79,130
Private Label [Member]
Schedule of Available for sale Securities [Line Items]
Available for Sale, Amortized Cost	936	2,713
Available for Sale, Gross Unrealized Gains	207	762
Available for Sale, Gross Unrealized Losses	11	11
Available for Sale, Estimated Fair Value	1,132	3,464
Obligations Of States And Political Subdivisions Thereof [Member]
Schedule of Available for sale Securities [Line Items]
Available for Sale, Amortized Cost	123,832	110,952
Available for Sale, Gross Unrealized Gains	1,941	4,758
Available for Sale, Gross Unrealized Losses	3,407	328
Available for Sale, Estimated Fair Value	$ 122,366	$ 115,382

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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