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Summary Of Significant Accounting Policies (Recent Accounting Pronouncements) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Standards Update 2017-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New accounting pronouncement in accounting principle, effect of adoption quantification			$ 142	$ 585
Accounting Standards Update 2018-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax Cuts and Jobs Act of 2017, reclassification from AOCI to retained earnings	$ 992
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment for fair value of equity securities		$ 201
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax Cuts and Jobs Act of 2017, reclassification from AOCI to retained earnings			992
Cumulative adjustment for fair value of equity securities		201
Accumulated Other Comprehensive Loss [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax Cuts and Jobs Act of 2017, reclassification from AOCI to retained earnings			$ (992)
Cumulative adjustment for fair value of equity securities		$ (201)

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