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
	Mar. 27, 2015	Aug. 14, 2015	Sep. 30, 2015	Sep. 30, 2014	Aug. 14, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Settlement of projected benefit obligations	$ 59,000
Pension Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 323	$ 227	$ 473	$ 1,656	$ 1,419
Interest cost		762	776	2,169	3,814	6,507
Expected return on plan assets		(676)	(658)	(1,938)	(3,384)	(5,814)
Amortization of prior service cost/benefit		1	0	1	3	3
Net cost		410	345	705	2,089	2,115
Postretirement Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		3	2	19	11	57
Interest cost		156	152	352	786	1,056
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Curtailments		0	0	0	0	1,048
Amortization of prior service cost/benefit		(22)	0	(47)	(108)	(141)
Net cost		$ 137	$ 154	$ 324	$ 689	$ 2,020