Parent Company Financial Information (Schedule of Condensed Statements of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Cash Flows From Operating Activities:
Net income	$ 3,002	$ 3,020	$ 2,049	$ 2,613	$ 808	$ 2,411	$ 2,286	$ 2,441	$ 10,684	$ 7,946
Adjustments to reconcile net income to net cash provided by operating activities:
Stock based compensation									315	559
Non-cash funding of retirement plans									584	542
Net change in other liabilities									706	1,899
Net change in other assets									(118)	(405)
Net Cash Provided by Operating Activities									15,003	14,938
Cash Flows From Financing Activities:
Taxes on exercise of stock options									(365)	(635)
Dividends paid									(1,204)	(1,194)
Net Cash Used in Financing Activities									61,260	322
Net Change in Cash and Cash Equivalents									6,404	(11,186)
Cash and Cash Equivalents at Beginning of Period				10,917				22,103	10,917	22,103
Cash and Cash Equivalents at End of Period	17,321				10,917				17,321	10,917
Parent Company [Member]
Cash Flows From Operating Activities:
Net income									10,684	7,946
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in income of subsidiary and dividends									(11,563)	(8,746)
Stock based compensation									315	559
Non-cash funding of retirement plans									584	542
Dividends to holding company									1,650	250
Net change in other liabilities									30	11
Net change in other assets									(16)	27
Net Cash Provided by Operating Activities									1,684	589
Cash Flows From Financing Activities:
Taxes on exercise of stock options									(365)	(635)
Dividends paid									(1,204)	(1,194)
Net Cash Used in Financing Activities									(1,569)	(1,829)
Net Change in Cash and Cash Equivalents									115	(1,240)
Cash and Cash Equivalents at Beginning of Period				$ 114				$ 1,354	114	1,354
Cash and Cash Equivalents at End of Period	$ 229				$ 114				$ 229	$ 114