Retirement Plans And Postretirement Benefits (Components Of Consolidated Net Pension Costs Retirement Plans) (Details) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2015	Aug. 14, 2015	Dec. 31, 2016	Dec. 31, 2014
Predecessor [Member] | U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 386	$ 151		$ 750
Interest cost	2,200	854		5,983
Expected return on assets		0		(5,215)
Amortization of prior service cost		0		0
Curtailment gain		0		0
Mark-to-market loss (gain)		0		18,431
Net Cost		1,005		19,949
Predecessor [Member] | Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	281	98		1,107
Interest cost	94	554		2,669
Expected return on assets		0		(2,516)
Amortization of prior service cost		(12)		2
Curtailment gain		0		(28)
Mark-to-market loss (gain)		0		(534)
Net Cost		$ 640		$ 700
Successor [Member] | U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	386		$ 1,325
Interest cost	2,200		5,744
Expected return on assets	(1,885)		(4,940)
Amortization of prior service cost	0
Curtailment gain	0
Mark-to-market loss (gain)	716		(2,322)
Net Cost	1,417		(193)
Successor [Member] | Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	281		698
Interest cost	94		243
Expected return on assets	(59)		(298)
Amortization of prior service cost	0
Curtailment gain	(675)
Mark-to-market loss (gain)	1,843		(220)
Net Cost	$ 1,484		$ 423