PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2015

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS

Summary of the components of net periodic benefit cost

	Three Months Ended June 30
	Nonunion Defined						Supplemental				Postretirement
	Benefit Pension Plan						Benefit Plan				Health Benefit Plan
	2015			2014			2015		2014		2015			2014
	(in thousands)

Service cost	$	—		$	—		$	—	$	—	$	102		$	70
Interest cost	1,223			1,522			30		49		229			197
Expected return on plan assets	(2,359		)	(2,605		)	—		—		—			—
Amortization of prior service credit	—			—			—		—		(48		)	(48		)
Pension settlement expense	597			909			—		—		—			—
Amortization of net actuarial loss	815			636			40		57		213			23

Net periodic benefit cost	$	276		$	462		$	70	$	106	$	496		$	242

	Six Months Ended June 30
	Nonunion Defined						Supplemental				Postretirement
	Benefit Pension Plan						Benefit Plan				Health Benefit Plan
	2015			2014			2015		2014		2015			2014
	(in thousands)

Service cost	$	—		$	—		$	—	$	—	$	203		$	140
Interest cost	2,543			3,242			61		98		457			394
Expected return on plan assets	(4,761		)	(5,436		)	—		—		—			—
Amortization of prior service credit	—			—			—		—		(95		)	(95		)
Pension settlement expense	1,716			4,600			—		—		—			—
Amortization of net actuarial loss	1,636			1,134			80		113		426			46

Net periodic benefit cost	$	1,134		$	3,540		$	141	$	211	$	991		$	485

Schedule of changes in the projected benefit obligation 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	2,543
Actuarial gain(1)	(1,971		)
Benefits paid	(12,562		)

Projected benefit obligation at June 30, 2015	162,420

Change in plan assets
Fair value of plan assets at December 31, 2014	158,265
Actual return on plan assets	3,687
Employer contributions	50
Benefits paid	(12,562		)

Fair value of plan assets at June 30, 2015	149,440

Funded status at June 30, 2015(2)	$	(12,980	)

Accumulated benefit obligation	$	162,420

⁽¹⁾

Actuarial (gain)/loss from remeasurement upon settlements was primarily impacted by changes in the discount rate since the previous remeasurement date. The discount rates used to remeasure the PBO upon settlement were 3.5%, 3.0%, and 3.2% at the June 30, 2015, March 31, 2015, and December 31, 2014 measurement dates, respectively.

⁽²⁾

Noncurrent liability recognized within pension and postretirement liabilities in the accompanying consolidated balance sheet at June 30, 2015.