Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Examination [Line Items]
Deferred Tax Assets, Valuation Allowance		$ 0	$ 0
Anticipated Reduction Resulting from Lapse of Applicable Statue of Limitations		509,000	852,000
Income tax interest and penalties		100,000	100,000	$ 100,000
Accrued income tax interest and penalties		$ 300,000	$ 300,000
Scenario, Forecast
Income Tax Examination [Line Items]
Anticipated Reduction Resulting from Lapse of Applicable Statue of Limitations	$ 500,000