Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2016

Pension Costs

Defined Benefit Plan Disclosure [Line Items]

Schedule Of Benefit Plans

	Predecessor			Successor
	For the Period July 1 Through August 14, 2015			For the Period August 15 Through September 30, 2015			For the Three Months Ended September 30, 2016
	(Dollars in thousands)
Service cost	$	323		$	227		$	506
Interest cost	762			776			1,498
Expected return on plan assets	(676		)	(658		)	(1,310		)
Amortization of prior service cost	1			—			3
Net cost	$	410		$	345		$	697

Postretirement Costs

Defined Benefit Plan Disclosure [Line Items]

Schedule Of Benefit Plans

	Predecessor			Successor
	For the Period July 1 Through August 14, 2015			For the Period August 15 Through September 30, 2015		For the Three Months Ended September 30, 2016
	(Dollars in thousands)
Service cost	$	3		$	2	$	1
Interest cost	156			152		272
Amortization of prior service cost	(22		)	—		—
Net cost	$	137		$	154	$	273