Effective June 30, 2011, the Company amended its defined benefit pension plans, freezing the benefit for all participants. As of the effective date, participants do not accrue any benefits under the plans, and new hires are not eligible to participate in the plans.


	Three Months Ended March 31,				Nine Months Ended March 31,
	2021		2020		2021		2020
(In thousands)
Service cost	$	—	$	—	$	—	$	—
Interest cost	859		1,059		2,578		3,177
Expected return on plan assets	(1,038)		(1,102)		(3,113)		(3,305)
Amortization of net loss(1)	502		370		1,507		1,109


Net periodic benefit cost	$	323	$	327	$	972	$	981

(1) These amounts represent the estimated portion of the net loss in AOCI that is expected to be recognized as a component of net periodic benefit cost over the current fiscal year.

The Company participates in two multiemployer defined benefit pension plans that are union sponsored and collectively bargained for the benefit of certain employees subject to collective bargaining agreements, of which the Western Conference of Teamsters Pension Plan ("WCTPP") is individually significant. The Company makes contributions to these plans generally based on the number of hours worked by the participants in accordance with the provisions of negotiated labor contracts.

The Company participates in nine multiemployer defined contribution plans other than pension plans that provide medical, vision, dental and disability benefits for active, union-represented employees subject to collective bargaining agreements. The plans are subject to the provisions of the Employee Retirement Income Security Act of 1974, and provide that participating employers make monthly contributions to the plans in an amount as specified in the collective bargaining agreements. Also, the plans provide that participants make self-payments to the plans, the amounts of which are negotiated through the collective bargaining process. The Company’s participation in these plans is governed by collective bargaining agreements which expire on or before January 31, 2025.

The Company’s 401(k) Plan is available to all eligible employees. Participants in the 401(k) Plan may choose to contribute a percentage of their annual pay subject to the maximum contribution allowed by the Internal Revenue Service. The Company recorded matching contributions of $0.5 million and $1.9 million, respectively, in operating expenses in the three and nine months ended March 31, 2020. Effective March 31, 2020, the Company temporarily suspended its 401K matching program in response to the COVID-19 pandemic.

Additionally, the Company makes an annual safe harbor non-elective contribution of shares of the Company’s common stock equal to 4% of each eligible participant’s annual plan compensation. During the three and nine months ended March 31, 2021, the Company contributed a total of 51,415 and 322,100 shares of the Company’s common stock with a value of $0.5 million and $1.8 million, respectively, to eligible participants’ annual plan compensation. During the three and nine months ended March 31, 2020, the Company contributed a total of 104,247 and 213,896 shares of the Company’s common stock with a value of $0.9 million and $2.3 million, respectively, to eligible participants’ annual plan compensation.

On March 23, 2020, the Company announced a plan to amend and terminate the postretirement medical benefit plan that covers qualified non-union retirees and certain qualified union retirees (“Retiree Medical Plan”) effective December 31, 2020. The plan provided medical, dental and vision coverage for retirees under age 65 and medical coverage only for retirees age 65 and above. Under this postretirement plan, the Company’s contributions toward premiums for retiree medical, dental and vision coverage for participants and dependents were scaled based on length of service, with greater Company contributions for retirees with greater length of service, subject to a maximum monthly Company contribution. The Company's retiree medical, dental and vision plan was unfunded and its liability was calculated using an assumed discount rate.

The Company’s communication of its intention to amend and terminate the Retiree Medical Plan triggered re-measurement and curtailment of the plan. As a result, the re-measurement generated a prior service credit of $13.4 million which were amortized over the remaining months of the plan, and a revised net periodic postretirement benefit credit for fiscal 2021 of $14.6 million which were also amortized over the remaining months of the plan. Also, the Company recognized a one-time non-cash curtailment credit of $5.8 million for the fiscal year ended June 30, 2020. As of December 31, 2020, the Retiree Medical Plan has terminated.

The Company continues to provide a postretirement death benefit (“Death Benefit”) to certain of its employees and retirees, subject, in the case of current employees, to continued employment with the Company until retirement and certain other conditions related to the manner of employment termination and manner of death.

The following table shows the components of net periodic postretirement benefit cost (credit) for the Retiree Medical Plan and Death Benefit for the three and nine months ended March 31, 2021 and 2020. Net periodic postretirement benefit cost was based on employee census information and asset information as of June 30, 2020.


	Three Months Ended March 31,				Nine Months Ended March 31,
	2021		2020		2021		2020
(In thousands)
Components of Net Periodic Postretirement Benefit Cost (Credit):
Service cost	$	5	$	147	$	14	$	441
Interest cost	73		214		220		641

Amortization of net gain	80		(125)		(5,376)		(374)
Curtailment credit - Retiree Medical	—		(5,750)		—		(5,750)
Amortization of prior service credit	—		(395)		(8,961)		(1,186)
Net periodic postretirement benefit credit	$	158	$	(5,909)	$	(14,103)	$	(6,228)