Income Taxes (Uncertain Tax Positions) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of period	$ 249
Change related to Georgia state income taxes	(249)
Balance at end of period	$ 0