Income Taxes (Unrecognized Tax Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 430	$ 1,293	$ 814
Reductions for tax positions as a result of a lapse of the applicable statute of limitations	(100)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefit beginning of year	1,293	814	848
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	71	0	0
Gross increases - tax positions in prior year	0	479	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	254	0	34
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	680	0	0
Unrecognized Tax Benefit end of year	$ 430	$ 1,293	$ 814