Merger (Preliminary Estimated Fair Value of Assets Acquired) (Details) - USD ($)	Jan. 08, 2018	Mar. 31, 2018	Dec. 31, 2017
Net assets acquired:
Goodwill		$ 22,528,000	$ 3,918,000
Scottdale Bank and Trust Company [Member]
Business Acquisition [Line Items]
Total purchase price	$ 66,973,000
Net assets acquired:
Cash and cash equivalents	67,817,000
Investment securities	114,039,000
Restricted stock	97,000
Loans	70,686,000
Core deposit intangible	4,940,000
Premises and equipment	1,496,000
Foreclosed assets	11,000
Deferred income taxes	621,000
Accrued interest receivable	989,000
Other assets	266,000
Deposits	(209,981,000)
Accrued interest payable	(16,000)
Other liabilities	(2,602,000)
Total net assets acquired	48,363,000
Goodwill	$ 18,610,000