Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2016		2015
Service cost for benefits earned	7,050		7,608
Interest cost on benefits obligation	8,281		7,689
Expected return on plan assets	(9,880	)	(8,980	)
Prior service cost amortization	174		167
Net actuarial loss amortization	2,028		3,508
Pension plan cost (1)	7,653		9,992

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