Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended			180 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2030
Investments, Owned, Federal Income Tax Note [Line Items]
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	$ 0	$ 0	$ 0
Effective income tax rate reconciliation, at federal statutory income tax rate	35.00%
Deferred tax assets, valuation allowance	$ 4,100	4,300
Deferred tax assets net operating loss and tax credit carryforwards expiring through 2030	500
Year which tax effect of remaining net operating loss and tax credit carryforwards expire				Dec. 31, 2030
Unrecognized tax benefits that would impact on effective tax rate	3,400	3,900
Accrued interest and penalties recognized net of federal and/or state tax benefits	$ 100	$ 700
Year thru which company is no longer subject to income tax examinations	2012