Pension Benefits (Tables)

6 Months Ended

Jun. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Summary of pension costs

The following summarizes our pension costs during the three and six months ended June 30, 2016 and June 30, 2015:

	Three Months Ended						Six Months Ended
(Amounts in thousands)	June 30, 2016			June 30, 2015			June 30, 2016			June 30, 2015
Service cost	$	600		$	600		$	1,200		$	1,200
Interest cost	2,242			2,301			4,484			4,601
Expected return on plan assets	(3,117		)	(3,356		)	(6,233		)	(6,711		)
Amortization of net actuarial loss	247			235			494			470
Total net periodic benefit	$	(28	)	$	(220	)	$	(55	)	$	(440	)

Schedule of weighted average assumptions used to determine net cost

Weighted-Average Assumptions Used To Determine Net Cost

	Three Months Ended				Six Months Ended
	June 30, 2016		June 30, 2015		June 30, 2016		June 30, 2015
Discount rate	4.10	%	3.80	%	4.10	%	3.80	%
Rate of compensation increase	N/A		N/A		N/A		N/A
Expected return on plan assets	7.25	%	7.25	%	7.25	%	7.25	%