Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of cost of pension plans

The cost of our pension plans are as follows:

(in thousands)	Three months ended June 30,						Six months ended June 30,
	2016			2015			2016			2015
Service cost for benefits earned	$	7,050		$	7,608		$	14,100		$	15,216
Interest cost on benefits obligation	8,282			7,689			16,563			15,378
Expected return on plan assets	(9,880		)	(8,980		)	(19,760		)	(17,960		)
Prior service cost amortization	174			167			348			334
Net actuarial loss amortization	2,027			3,508			4,055			7,016
Pension plan cost (1)	$	7,653		$	9,992		$	15,306		$	19,984

(1) Pension plan costs represent the total cost before reimbursements from the Exchange and EFL.