PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2014

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
	2014			2013			2014		2013		2014			2013
	(in thousands)

Service cost	$	—		$	2,367		$	—	$	—	$	70		$	83
Interest cost	1,522			1,922			49		38		197			187
Expected return on plan assets	(2,605		)	(3,155		)	—		—		—			—
Amortization of prior service credit	—			—			—		—		(48		)	(47		)
Pension settlement expense	909			—			—		—		—			—
Amortization of net actuarial loss	636			2,714			57		65		23			133
Net periodic benefit cost	$	462		$	3,848		$	106	$	103	$	242		$	356

	Six Months Ended June 30
	Nonunion Defined						Supplemental				Postretirement
	Benefit Pension Plan						Benefit Plan				Health Benefit Plan
	2014			2013			2014		2013		2014			2013
	(in thousands)

Service cost	$	—		$	4,734		$	—	$	—	$	140		$	166
Interest cost	3,242			3,845			98		75		394			375
Expected return on plan assets	(5,436		)	(6,309		)	—		—		—			—
Amortization of prior service credit	—			—			—		—		(95		)	(95		)
Pension settlement expense	4,600			—			—		—		—			—
Amortization of net actuarial loss	1,134			5,427			113		130		46			267
Net periodic benefit cost	$	3,540		$	7,697		$	211	$	205	$	485		$	713

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, 2013	$	211,660
Interest cost	3,242
Actuarial loss(1)	10,713
Benefits paid(2)	(48,284		)
Projected benefit obligation at June 30, 2014	177,331
Change in plan assets
Fair value of plan assets at December 31, 2013	207,613
Actual return on plan assets	7,184
Benefits paid(2)	(48,284		)
Fair value of plan assets at June 30, 2014	166,513

Funded status at June 30, 2014(3)	$	(10,818	)

Accumulated benefit obligation	$	177,331

(1) Net actuarial 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 3.3%, 3.5%, and 3.8% at the June 30, 2014, March 31, 2014, and December 31, 2013 measurement dates, respectively.

(2) Includes purchase of nonparticipating annuity contract, lump-sum distributions, and periodic payments made by the plan during the six months ended June 30, 2014.

(3) Noncurrent liability recognized within pension and postretirement liabilities in the accompanying consolidated balance sheet at June 30, 2014.