Basis of Presentation and Significant Accounting Policies Adoption of New Accounting Standards (Details) - Accounting Standards Update 2016-09 [Member] - Successor [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ (137)
AOCI Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	0
Retained Earnings [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ (137)