Retirement Plans And Postretirement Benefits (Reconciliation Of Pension Plans' Benefit Obligations, Fair Value Of Assets Retirement Plans) (Details) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2015	Aug. 14, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
U.S. [Member] | Postretirement Benefit Costs [Member]
Changes in Benefit Obligation:
Service cost	$ 0		$ 0	$ 0	$ 0
Interest cost	142		223	396	371
U.S. [Member] | Retirement Plans [Member]
Changes in Plan Assets:
Fair value of plan assets at beginning of year		$ 99,454	99,454
Fair value of plan assets at end of year	93,897		93,897	99,454
Foreign [Member] | Postretirement Benefit Costs [Member]
Changes in Benefit Obligation:
Service cost	5		9	71	105
Interest cost	289		433	976	994
Foreign [Member] | Retirement Plans [Member]
Changes in Plan Assets:
Fair value of plan assets at beginning of year		77,728	77,728
Fair value of plan assets at end of year	11,293		11,293	77,728
Predecessor [Member]
Changes in Plan Assets:
Funded status:				(4,875)
Predecessor [Member] | U.S. [Member] | Postretirement Benefit Costs [Member]
Changes in Benefit Obligation:
Net benefit obligation at beginning of year		11,586	11,586	11,275
Service cost				0
Interest cost				396
Foreign currency exchange rates				0
Actuarial loss (gain)				1,151
Gross benefits paid				(1,236)
Plan amendment				0
Net benefit obligation at end of year				11,586	11,275
Changes in Plan Assets:
Fair value of plan assets at beginning of year		0	0	0
Employer contributions				1,236
Gross benefits paid				(1,236)
Fair value of plan assets at end of year				0	0
Funded status:				(11,586)
Prior service credit				0
Current liabilities				(1,204)
Non-current liabilities				(10,382)
Net amount recognized				(11,586)
Predecessor [Member] | U.S. [Member] | Retirement Plans [Member]
Changes in Benefit Obligation:
Net benefit obligation at beginning of year		154,368	154,368	134,787
Service cost		151		750	870
Interest cost		854		5,983	5,438
Foreign currency exchange rates				0
Actuarial loss (gain)				21,456
Gross benefits paid				(8,608)
Net benefit obligation at end of year				154,368	134,787
Changes in Plan Assets:
Fair value of plan assets at beginning of year		99,454	99,454	90,875
Actual return on plan assets				8,240
Foreign currency exchange rate changes				0
Employer contributions				8,947
Participant contributions				0
Gross benefits paid				(8,608)
Fair value of plan assets at end of year				99,454	90,875
Funded status:				(54,914)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax				0
Non-current assets				0
Current liabilities				(439)
Non-current liabilities				(54,475)
Net amount recognized				(54,914)
Defined Benefit Plan, Plan Amendments				0
Predecessor [Member] | Foreign [Member] | Postretirement Benefit Costs [Member]
Changes in Benefit Obligation:
Net benefit obligation at beginning of year		15,404	15,404	15,645
Service cost				71
Interest cost				976
Foreign currency exchange rates				(1,437)
Actuarial loss (gain)				1,511
Gross benefits paid				(1,068)
Plan amendment				294
Net benefit obligation at end of year				15,404	15,645
Changes in Plan Assets:
Fair value of plan assets at beginning of year		0	0	0
Employer contributions				1,068
Gross benefits paid				(1,068)
Fair value of plan assets at end of year				0	0
Funded status:				(15,404)
Prior service credit				1,554
Current liabilities				(953)
Non-current liabilities				(14,451)
Net amount recognized				(15,404)
Predecessor [Member] | Foreign [Member] | Retirement Plans [Member]
Changes in Benefit Obligation:
Net benefit obligation at beginning of year		82,603	82,603	78,421
Service cost		98		1,107	1,177
Interest cost		554		2,669	2,542
Foreign currency exchange rates				(6,171)
Actuarial loss (gain)				11,935
Gross benefits paid				(5,646)
Net benefit obligation at end of year				82,603	78,421
Changes in Plan Assets:
Fair value of plan assets at beginning of year		77,728	77,728	72,685
Actual return on plan assets				14,971
Foreign currency exchange rate changes				(5,479)
Employer contributions				909
Participant contributions				288
Gross benefits paid				(5,646)
Fair value of plan assets at end of year				77,728	$ 72,685
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax				(25)
Non-current assets				1,365
Current liabilities				(324)
Non-current liabilities				(5,916)
Net amount recognized				$ (4,875)
Defined Benefit Plan, Plan Amendments
Successor [Member]
Changes in Plan Assets:
Fair value of plan assets at end of year	11,293		11,293
Funded status:	(6,978)		(6,978)
Successor [Member] | U.S. [Member] | Postretirement Benefit Costs [Member]
Changes in Benefit Obligation:
Net benefit obligation at beginning of year		11,395	11,395
Service cost			0
Interest cost			142
Foreign currency exchange rates			0
Actuarial loss (gain)			(100)
Gross benefits paid			(578)
Plan amendment			0
Net benefit obligation at end of year	10,859		10,859	$ 11,395
Changes in Plan Assets:
Fair value of plan assets at beginning of year		0	0
Employer contributions			578
Gross benefits paid			(578)
Fair value of plan assets at end of year	0		0	0
Funded status:	(10,859)		(10,859)
Prior service credit	0		0
Current liabilities	(1,298)		(1,298)
Non-current liabilities	(9,561)		(9,561)
Net amount recognized	(10,859)		(10,859)
Successor [Member] | U.S. [Member] | Retirement Plans [Member]
Changes in Benefit Obligation:
Net benefit obligation at beginning of year		146,790	146,790
Service cost	386		386
Interest cost	2,200		2,200
Foreign currency exchange rates			0
Actuarial loss (gain)			(3,896)
Gross benefits paid			(3,354)
Net benefit obligation at end of year	142,126		142,126	146,790
Changes in Plan Assets:
Fair value of plan assets at beginning of year		97,473	97,473
Actual return on plan assets			(2,727)
Foreign currency exchange rate changes			0
Employer contributions			2,505
Participant contributions			0
Gross benefits paid			(3,354)
Fair value of plan assets at end of year	93,897		93,897	97,473
Funded status:	(48,229)		(48,229)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax			0
Non-current assets	0		0
Current liabilities	(437)		(437)
Non-current liabilities	(47,792)		(47,792)
Net amount recognized	(48,229)		(48,229)
Defined Benefit Plan, Plan Amendments			0
Successor [Member] | Foreign [Member] | Postretirement Benefit Costs [Member]
Changes in Benefit Obligation:
Net benefit obligation at beginning of year		13,457	13,457
Service cost			5
Interest cost			289
Foreign currency exchange rates			(1,489)
Actuarial loss (gain)			(621)
Gross benefits paid			(345)
Plan amendment			0
Net benefit obligation at end of year	11,296		11,296	13,457
Changes in Plan Assets:
Fair value of plan assets at beginning of year		0	0
Employer contributions			345
Gross benefits paid			(345)
Fair value of plan assets at end of year	0		0	0
Funded status:	(11,296)		(11,296)
Prior service credit	0		0
Current liabilities	(755)		(755)
Non-current liabilities	(10,541)		(10,541)
Net amount recognized	(11,296)		(11,296)
Successor [Member] | Foreign [Member] | Retirement Plans [Member]
Changes in Benefit Obligation:
Net benefit obligation at beginning of year		18,512	18,512
Service cost	281		281
Interest cost	94		94
Foreign currency exchange rates			(480)
Actuarial loss (gain)			377
Gross benefits paid			(14)
Net benefit obligation at end of year	18,271		18,271	18,512
Changes in Plan Assets:
Fair value of plan assets at beginning of year		$ 12,811	12,811
Actual return on plan assets			(1,407)
Foreign currency exchange rate changes			(346)
Employer contributions			170
Participant contributions			79
Gross benefits paid			(14)
Fair value of plan assets at end of year				$ 12,811
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax			(95)
Non-current assets	0		0
Current liabilities	(253)		(253)
Non-current liabilities	(6,725)		(6,725)
Net amount recognized	$ (6,978)		(6,978)
Defined Benefit Plan, Plan Amendments			$ (578)