Pension Benefits (Tables)

6 Months Ended

Jun. 30, 2017

Retirement Benefits [Abstract]

Summary of pension costs

The following summarizes our pension costs during the three and six months ended June 30, 2017 and June 30, 2016:

	Three Months Ended						Six Months Ended
(Amounts in thousands)	June 30, 2017			June 30, 2016			June 30, 2017			June 30, 2016
Service cost	$	425		$	600		$	850		$	1,200
Interest cost	2,066			2,242			4,131			4,484
Expected return on plan assets	(3,210		)	(3,117		)	(6,421		)	(6,233		)
Amortization of net actuarial loss	210			247			421			494
Total net periodic benefit	$	(509	)	$	(28	)	$	(1,019	)	$	(55	)

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, 2017		June 30, 2016		June 30, 2017		June 30, 2016
Discount rate	3.90	%	4.10	%	3.90	%	4.10	%
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	%