EMPLOYEE BENEFIT PLANS

3 Months Ended

Mar. 31, 2016

Pension and Other Postretirement Benefit Expense [Abstract]

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS

Beginning with the December 31, 2015 measurement, the Company changed its method used to estimate the service and interest cost components of net periodic benefit cost for pension and other postretirement benefits by applying a spot rate approach. Historically, the Company utilized a single weighted average discount rate derived from a selected yield curve used to measure the benefit obligation as of the measurement date. Under the new spot rate approach, the actual calculation of service and interest cost will reflect an array of spot rates along the yield curve used in the determination of the benefit obligation to the relevant projected cash flows. The Company made this change to provide a more precise measurement of service and interest costs by improving the correlation between projected benefit cash flows to the corresponding spot rates from the selected yield curve. This new approach does not affect the measurement of the total benefit obligation.

Components of the net periodic benefit cost for the three months ended March 31, 2016 (Successor Company), the period of February 1, 2015 to March 31, 2015 (Successor Company), and the period of January 1, 2015 to January 31, 2015 (Predecessor Company) are as follows:

	Successor Company										Predecessor Company
	For The Three Months Ended March 31, 2016					February 1, 2015 to March 31, 2015					January 1, 2015 to January 31, 2015
	Defined Benefit Pension Plan			Unfunded Excess Benefit Plan		Defined Benefit Pension Plan			Unfunded Excess Benefit Plan		Defined Benefit Pension Plan			Unfunded Excess Benefit Plan
	(Dollars In Thousands)										(Dollars In Thousands)
Service cost — benefits earned during the period	$	2,906		$	313	$	1,982		$	222	$	974		$	95
Interest cost on projected benefit obligation	2,737			438		1,622			272		1,002			140
Expected return on plan assets	(3,605		)	—		(2,428		)	—		(1,293		)	—
Amortization of prior service cost	—			—		—			—		(33		)	1
Amortization of actuarial losses	—			—		—			—		668			138
Total net periodic benefit cost	$	2,038		$	751	$	1,176		$	494	$	1,318		$	374

During the three months ended March 31, 2016 (Successor Company), the Company did not make a contribution to its defined benefit pension plan. The Company will make contributions in future periods as necessary to at least satisfy minimum funding requirements. The Company may also make additional contributions in future periods to maintain an adjusted funding target attainment percentage (“AFTAP”) of at least 80% and to avoid certain Pension Benefit Guaranty Corporation (“PBGC”) reporting triggers.