Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Oct. 01, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent		4.50%	(6.70%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount	$ 0		$ 900
Operating Loss Carryforwards	84,400	$ 84,400
Unrecognized Tax Benefits	0	0		$ 0
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 0	$ 0		$ 0