PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2015

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS

Summary of the components of net periodic benefit cost

	Three Months Ended March 31
	Nonunion Defined						Supplemental				Postretirement
	Benefit Pension Plan						Benefit Plan				Health Benefit Plan
	2015			2014			2015		2014		2015			2014
	(in thousands)
Service cost	$	—		$	—		$	—	$	—	$	101		$	70
Interest cost	1,320			1,720			31		49		228			197
Expected return on plan assets	(2,402		)	(2,831		)	—		—		—			—
Amortization of prior service credit	—			—			—		—		(47		)	(47		)
Pension settlement expense	1,119			3,691			—		—		—			—
Amortization of net actuarial loss	821			498			40		56		213			23
Net periodic benefit cost	$	858		$	3,078		$	71	$	105	$	495		$	243

Schedule of changes in the PBO and plan assets of the nonunion defined benefit pension plan

	Nonunion Defined
	Benefit Pension Plan
	(in thousands)
Change in projected benefit obligation
Projected benefit obligation at December 31, 2014	$	174,410
Interest cost	1,320
Actuarial loss(1)	4,171
Benefits paid	(7,665		)
Projected benefit obligation at March 31, 2015	172,236
Change in plan assets
Fair value of plan assets at December 31, 2014	158,265
Actual return on plan assets	3,577
Employer contributions	50
Benefits paid	(7,665		)
Fair value of plan assets at March 31, 2015	154,227
Funded status at March 31, 2015(2)	$	(18,009	)
Accumulated benefit obligation	$	172,236

(1) Net actuarial loss from remeasurement upon settlement was primarily impacted by changes in the discount rate since the previous remeasurement date. The discount rate used to remeasure the PBO upon settlement at March 31, 2015 was 3.0% compared to a rate of 3.2% as of the December 31, 2014 measurement date.

(2) Noncurrent liability recognized within pension and postretirement liabilities in the accompanying consolidated balance sheet at March 31, 2015.