Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2014	Aug. 03, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Entity Information [Line Items]
Federal	$ 0		$ 0	$ 0
Property, plant and equipment			(1,488)	(1,291)
Turnaround costs			(248)	(101)
Deferred tax liabilities-total			(1,736)	(1,392)
Balance sheet classifications
Noncurrent deferred tax liability			(1,736)	(1,392)
State and local	800		691	1,128
Current Income Tax Expense (Benefit)	800		691	1,128
Federal	0		0	0
State and local	265		344	(456)
Deferred Income Tax Expense (Benefit)	265		344	(456)
Total provision	$ 1,065		$ 1,035	$ 672
Predecessor [Member]
Entity Information [Line Items]
Federal		$ 168,773
Balance sheet classifications
State and local		21,207
Current Income Tax Expense (Benefit)		189,980
Federal		6,890
State and local		1,453
Deferred Income Tax Expense (Benefit)		8,343			$ 8,608
Total provision		$ 198,323			$ 199,388