Loans (Schedule for Loans Individually Evaluated for Impairment) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
With No Related Allowance Recorded:
Unpaid Principal Balance	[1]	$ 8,091		$ 8,091		$ 11,275
Recorded Investment		4,232		4,232		7,016
Average Recorded Investment		4,557	$ 2,868	5,001	$ 3,080
Interest Income Recognized		13	26	32	52
Cash Basis Recognized		0	0	0	7
With An Allowance Recorded:
Unpaid Principal Balance	[1]	6,288		6,288		6,757
Recorded Investment		5,955		5,955		6,565
Allowance for Loan Losses Allocated		1,907		1,907		1,826
Average Recorded Investment		6,085	7,820	6,531	8,363
Interest Income Recognized		0	7	0	11
Cash Basis Recognized		0	0	0	0
Unpaid Principal Balance	[1]	14,379		14,379		18,032
Recorded Investment		10,187		10,187		13,581
Average Recorded Investment		10,642	10,688	11,532	11,443
Interest Income Recognized		13	33	32	63
Cash Basis Recognized		0	0	0	7
Loans Acquired With Deteriorated Credit Quality
With No Related Allowance Recorded:
Unpaid Principal Balance	[1]	6,884		6,884		8,060
Recorded Investment		3,320		3,320		3,958
Average Recorded Investment		3,386	546	4,414	548
Interest Income Recognized		8	0	15	0
Cash Basis Recognized		0	0	0	0
With An Allowance Recorded:
Unpaid Principal Balance	[1]	1,142		1,142		196
Recorded Investment		820		820		4
Allowance for Loan Losses Allocated		357		357		3
Average Recorded Investment		744	207	3,861	211
Interest Income Recognized		0	7	0	11
Cash Basis Recognized		0	0	0	0
Commercial and Industrial Loans and Leases
With No Related Allowance Recorded:
Unpaid Principal Balance	[1]	2,346		2,346		3,721
Recorded Investment		142		142		1,183
Average Recorded Investment		164	1,142	301	1,163
Interest Income Recognized		2	13	4	26
Cash Basis Recognized		0	0	0	1
With An Allowance Recorded:
Unpaid Principal Balance	[1]	1,974		1,974		2,353
Recorded Investment		1,974		1,974		2,353
Allowance for Loan Losses Allocated		139		139		143
Average Recorded Investment		2,128	2,690	2,207	3,487
Interest Income Recognized		0	1	0	2
Cash Basis Recognized		0	0	0	0
Commercial Real Estate Loans
With No Related Allowance Recorded:
Unpaid Principal Balance	[1]	4,003		4,003		5,828
Recorded Investment		2,615		2,615		4,383
Average Recorded Investment		2,981	1,180	3,291	1,294
Interest Income Recognized		11	13	28	26
Cash Basis Recognized		0	0	0	6
With An Allowance Recorded:
Unpaid Principal Balance	[1]	4,314		4,314		4,404
Recorded Investment		3,981		3,981		4,212
Allowance for Loan Losses Allocated		1,768		1,768		1,683
Average Recorded Investment		3,957	5,130	4,324	4,876
Interest Income Recognized		0	6	0	9
Cash Basis Recognized		0	0	0	0
Agricultural Loans
With No Related Allowance Recorded:
Unpaid Principal Balance	[1]	1,742		1,742		1,726
Recorded Investment		1,475		1,475		1,450
Average Recorded Investment		1,412	546	1,409	623
Interest Income Recognized		0	0	0	0
Cash Basis Recognized		0	0	0	0
With An Allowance Recorded:
Unpaid Principal Balance	[1]	0		0		0
Recorded Investment		0		0		0
Allowance for Loan Losses Allocated		0		0		$ 0
Average Recorded Investment		0	0	0	0
Interest Income Recognized		0	0	0	0
Cash Basis Recognized		$ 0	$ 0	$ 0	$ 0

[1] Unpaid Principal Balance is the remaining contractual payments gross of partial charge-offs and discounts.