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Employee Benefit Plans
 6 Months Ended
Jun. 30, 2020
Retirement Benefits [Abstract]  
Employee Benefit Plans Employee Benefit Plans
We sponsor a noncontributory defined benefit pension plan and non-qualified Supplemental Executive Retirement Plans ("SERPs"). The accrual for future benefits has been frozen in our defined benefit pension plan and SERPs.

We sponsor a defined contribution plan covering substantially all non-union and certain union employees. We match a portion of employees' voluntary contributions to this plan.
Other union-represented employees are covered by defined benefit pension plans jointly sponsored by us and the union, or by union-sponsored multi-employer plans.

The components of the employee benefit plans expense consisted of the following:
 Three Months Ended 
June 30,		Six Months Ended 
June 30,
(in thousands)2020201920202019
Interest cost$4,918  $5,800  $9,835  $11,600  
Expected return on plan assets, net of expenses(5,256) (5,058) (10,512) (10,116) 
Amortization of actuarial loss and prior service cost1,124  572  2,249  1,144  
Total for defined benefit pension plan786  1,314  1,572  2,628  
Multi-employer plans52  58  61  99  
SERPs240  250  480  508  
Defined contribution plan3,702  1,695  7,481  4,690  
Net periodic benefit cost4,780  3,317  9,594  7,925  
Allocated to discontinued operations(121) (84) (326) (190) 
Net periodic benefit cost — continuing operations$4,659  $3,233  $9,268  $7,735  

We contributed $0.5 million to fund current benefit payments for our SERPs and $4.8 million for our defined benefit pension plan during the six months ended June 30, 2020. During the remainder of 2020, we anticipate contributing an additional $0.7 million to fund the SERPs' benefit payments. We are required to contribute an additional $27.0 million to fund our qualified defined benefit pension plan in order to meet our 2020 funding requirements under the provisions of the Pension Funding Equity Act of 2004 and the Pension Protection Act of 2006. In response to COVID-19, President Donald Trump signed into law the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”). The CARES Act provides a provision to defer 2020 pension contributions until January 1, 2021. Currently, we do not anticipate delaying the payment of 2020 pension contributions with respect to this permitted CARES Act provision.