PENSION AND OTHER POST-RETIREMENT BENEFITS

The Company maintains several qualified and non-qualified pension plans and other post-retirement benefit plans. The following table presents the components of pension expense for the Company's significant pension plans. The Company's other pension and post-retirement benefit plans are not significant individually or in the aggregate.



	Three Months Ended March 31,
	2020			2019
Interest cost	$	3,275		$	4,449
Expected return on plan assets	(5,574		)	(4,964		)
Amortization of actuarial loss	2,849			2,484
Total	$	550		$	1,969

Pension expense is included in Selling, general and administrative expenses in the consolidated statements of operations. Required future pension contributions are estimated based upon assumptions such as discount rates on future obligations, assumed rates of return on plan assets and legislative changes. Actual future pension costs and required funding obligations will be affected by changes in the factors and assumptions described in the previous sentence, including the expected impact of declines in pension plan assets and interest rates which occurred during the three months ended March 31, 2020 and may continue into the future, as well as other changes such as any plan termination or other acceleration events. On March 27, 2020, President Trump signed the Coronavirus Aid, Relief, and Economic Security ("CARES") Act into law. As a result of the CARES Act, U.S. pension plan contributions that were expected to be made after March 2020 have been deferred until January 1, 2021. The Company's current expected future minimum pension contributions to its significant pension plans are $0 for the remainder of 2020, and $63,600, $32,400, $25,900, $15,700 and $5,800 in 2021, 2022, 2023, 2024 and for the five years thereafter, respectively.