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Acquisition of The Scottdale Bank and Trust Company (Pro Forma Information) (Details) - USD ($) $ / shares in Units, $ 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	Dec. 31, 2016
Business Acquisition [Line Items]
Net interest income after loan loss provision	$ 17,456	$ 15,811	$ 11,414	$ 10,753	$ 9,387	$ 9,516	$ 9,310	$ 9,050	$ 55,434	$ 37,263	$ 32,975
Noninterest income	2,091	2,165	1,559	1,647	1,331	1,564	1,362	1,436	7,462	5,707	5,946
Noninterest expense	$ 13,982	$ 15,264	$ 9,742	$ 11,183	$ 8,047	$ 7,960	$ 7,558	$ 7,802	50,171	31,381	$ 28,840
Scottdale Bank and Trust Company [Member]
Business Acquisition [Line Items]
Net interest income after loan loss provision									55,434	43,371
Noninterest income									7,462	6,094
Noninterest expense									48,867	38,403
Net income									$ 11,736	$ 8,075
Net income per common share									$ 1.64	$ 1.32

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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Amount of interest income or expense, including any amortization and accretion (as applicable) of discounts and premiums, including consideration of the provisions for loan, lease, credit, and other related losses.

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