Income Taxes (Schedule Of Deferred Tax Assets And Deferred Tax Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Predecessor [Member]
Deferred tax assets:
Fixed assets		$ 10,128
Postretirement and other employee benefits		34,713
Foreign tax credit and other carryforwards		115,163
Capitalized research and experimental costs		21,592
Environmental reserves		4,273
Inventory		12,719
Original issue discount		0
Long-term contract option amortization		2,138
Provision for rationalization charges		5,967
Other		1,005
Total gross deferred tax assets		207,698
Less: valuation allowance		(165,539)
Total deferred tax assets		42,159
Deferred tax liabilities:
Fixed assets		64,278
Debt discount amortization / Deferred financing fees		7,666
Inventory		4,985
Goodwill and acquired intangibles		2,686
Other		4,647
Total deferred tax liabilities		84,262
Total deferred tax liabilities		$ (42,103)
Successor [Member]
Deferred tax assets:
Fixed assets	$ 41,677
Postretirement and other employee benefits	32,275
Foreign tax credit and other carryforwards	153,169
Capitalized research and experimental costs	18,146
Environmental reserves	4,237
Inventory	15,227
Original issue discount	6,461
Long-term contract option amortization	2,074
Provision for rationalization charges	7,498
Other	3,391
Total gross deferred tax assets	284,155
Less: valuation allowance	(244,841)
Total deferred tax assets	39,314
Deferred tax liabilities:
Fixed assets	47,346
Debt discount amortization / Deferred financing fees	6,544
Inventory	3,482
Goodwill and acquired intangibles	2,295
Other	2,751
Total deferred tax liabilities	62,418
Total deferred tax liabilities	$ (23,104)