Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Federal statutory income tax rate (as a percent) 2100.00% 35.52% 3500.00%
Deferred income taxes $ 4,790,000   $ 4,943,000
Blended tax rate (as a percent) 21.60%    
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability $ 200,000    
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent 0.60%    
Unrecognized Tax Benefits $ 0    
Income Tax Examination, Penalties and Interest Expense $ 0 $ 0