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Federal Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Federal tax rate		34.00%	34.00%	34.00%
Rate change adjustment		$ 1,169,000
Unrecognized tax benefits that would affect the effective income tax rate if recognized		0
Income Tax Examination, Penalties and Interest Expense		0	$ 0	$ 0
Income Tax Examination, Penalties and Interest Accrued		$ 0	$ 0
Scenario Forecast [Member]
Income Taxes [Line Items]
Federal tax rate	21.00%

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Income Taxes.

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Tax cuts and jobs act of 2017 change in tax rate income tax expense benefit.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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