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Loans And Leases (Individually Evaluated For Impairment By Class Of Loans) (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2018		Mar. 31, 2017	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	$ 388			$ 391
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	3,354			3,439
Impaired Financing Receivable, Unpaid Principal Balance, Total	3,742			3,830
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	134			137
Impaired Financing Receivable, with Related Allowance, Recorded Investment	3,354			3,439
Impaired Financing Receivable, Recorded Investment, Total	3,488			3,576
Impaired Financing Receivable, Allocated Loans and Leases	27			26
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	135		$ 687
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	3,376		3,542
Impaired Financing Receivable, Average Recorded Investment, Total	3,511		4,229
Impaired Financing Receivable, with no Related Allowance, Interest Income Recognized	5		14
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	44		38
Impaired Financing Receivable, Interest Income Recognized, Total	49		52
Impaired Financing Receivable Allocated Loans and Leases	27			26
Impaired financing receivable, rounding threshold	1			1
Single-Family Residential [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	115	[1]		116
Impaired Financing Receivable, with Related Allowance, Recorded Investment	115	[1]		116
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	115	[1]	120
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	1	[1]	2
Multi-Family Residential [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment			36
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized			1
Non-Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	2,841			2,856
Impaired Financing Receivable, with Related Allowance, Recorded Investment	2,841			2,856
Impaired Financing Receivable, Allocated Loans and Leases	26			24
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	2,847		2,173
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	39		32
Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	388			391
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	187			190
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	134			137
Impaired Financing Receivable, with Related Allowance, Recorded Investment	187			190
Impaired Financing Receivable, Allocated Loans and Leases	1			2
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	135		394
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	187		1,025
Impaired Financing Receivable, with no Related Allowance, Interest Income Recognized	5		12
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	2		2
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	211	[1]		277
Impaired Financing Receivable, with Related Allowance, Recorded Investment	211	[1]		$ 277
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment			293
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	227	[1]	188
Impaired Financing Receivable, with no Related Allowance, Interest Income Recognized			2
Impaired Financing Receivable, with Related Allowance, Interest Income Recognized	$ 2	[1]	$ 1
[1] Allowance recorded is less than $1 resulting in rounding to zero.

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Impaired Financing Receivable Allocated Allowance Loans And Leases

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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