Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, expiration	Dec. 31, 2027
Amount of retained earnings which has no provision for federal income taxes	$ 5,095,000
Unrecorded deferred income tax liability	1,762,000
Unrecognized tax benefits	0	$ 0	$ 0
Increase in unrecognized tax benefits	0
Accrual of unrecognized tax benefit, income tax penalties and interest accrued	0	$ 0	$ 0
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	561,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	106,000
Internal Revenue Service
Operating Loss Carryforwards [Line Items]
Provision of federal income taxes in retained earnings, for allowable bad debt deductions	$ 0