Federal Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Effective income tax rate	17.65%	40.71%
Federal income tax rate	21.00%	34.00%
Material unrecognized tax benefits or accrued interest and penalties	$ 0
Income tax expense resulted from re-measurement of net deferred tax asset	1,800,000
State and Local Jurisdiction [Member] | Commonwealth of Pennsylvania [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards	$ 11,400,000	$ 10,500,000
Minimum [Member]
Income Tax Contingency [Line Items]
Open tax year for examinations	2015
Maximum [Member]
Income Tax Contingency [Line Items]
Open tax year for examinations	2017