Benefit Plans (Schedule Of Benefit Plans) (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	7 Months Ended	9 Months Ended
	Aug. 14, 2015	Sep. 30, 2015	Sep. 30, 2016	Aug. 14, 2015	Sep. 30, 2016
Pension Costs
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 323	$ 227	$ 506	$ 1,656	$ 1,517
Interest cost	762	776	1,498	3,814	4,494
Expected return on plan assets	(676)	(658)	(1,310)	(3,384)	(3,929)
Amortization of prior service cost/benefit	1	0	3	3	7
Net cost	410	345	697	2,089	2,089
Postretirement Costs
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	2	1	11	3
Interest cost	156	152	272	786	815
Amortization of prior service cost/benefit	(22)	0	0	(108)	0
Net cost	$ 137	$ 154	$ 273	$ 689	$ 818