Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2015

Pension Costs [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule Of Benefit Plans

	For the Three Months Ended September 30, 2014			For the Period July 1, 2015 Through August 14, 2015			For the Period August 15, 2015 Through September 30, 2015			For the Nine Months Ended September 30, 2014			For the Period January 1, 2015  Through August 14, 2015			For the Period August 15, 2015 Through September 30, 2015
	(Dollars in thousands)									(Dollars in thousands)
Service cost	$	473		$	323		$	227		$	1,419		$	1,656		$	227
Interest cost	2,169			762			776			6,507			3,814			776
Expected return    on plan assets	(1,938		)	(676		)	(658		)	(5,814		)	(3,384		)	(658		)
Amortization of prior    service cost	1			1			—			3			3			—
Net cost	$	705		$	410		$	345		$	2,115		$	2,089		$	345

Postretirement Costs [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule Of Benefit Plans

	For the Three Months Ended September 30, 2014			For the Period July 1, 2015 Through August 14, 2015			For the Period August 15, 2015 Through September 30, 2015		For the Nine Months Ended September 30, 2014			For the Period January 1, 2015  Through August 14, 2015			For the Period August 15, 2015 Through September 30, 2015
	(Dollars in thousands)								(Dollars in thousands)
Service cost	$	19		$	3		$	2	$	57		$	11		$	2
Interest cost	352			156			152		1,056			786			152
Curtailment loss	—			—			—		1,048			—			—
Amortization of prior    service benefit	(47		)	(22		)	—		(141		)	(108		)	—
Net cost	$	324		$	137		$	154	$	2,020		$	689		$	154