Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Valuation allowance increase	$ 57,000	$ 71,000
Income tax expense, reduction of deferred tax assets, Tax Cuts and Jobs Act of 2017	4,710,000
Effective income tax rate increase	$ 0.3099
Effective income tax rate	41.00%	31.30%	30.50%
Unrecognized tax benefits	$ 0	$ 0
Interest or penalties on unrecognized tax benefits	0	$ 0
Anticipated increase in unrecognized tax benefits next twelve months	0
Anticipated decrease in unrecognized tax benefits next twelve months	$ 0
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Income tax year, under examination	December 31, 2017, 2016, 2015 and 2014
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Income tax year, under examination	December 31, 2017, 2016, 2015 and 2014