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Employee Retirement Plans
 12 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Employee Retirement Plans Employee Retirement Plans
We have a defined contribution plan in which all U.S. full-time employees are eligible to participate. The participants may contribute from 1% to 70% of their compensation, as defined in the plan. We match 100% of the first 3%, plus 50% of the next 3%, of each participant's base compensation with full vesting immediately. We may also make additional contributions to the plan as determined by the Board of Directors. The total expense for the defined contribution plan was $2.0 million, $1.9 million and $1.7 million for 2024, 2023 and 2022, respectively.

Certain employees of our Lynchburg manufacturing facility were covered by defined benefit pension plans. We had a qualified defined benefit plan (the "Plan") and an unfunded non-qualified plan.

During the fourth quarter of 2021, we adopted a termination date of April 30, 2021 for the Plan and began the Plan termination process. The settlements of the terminated Plan occurred during the first quarter of fiscal 2023, with lump sum settlements in the amount of $13.8 million being paid to eligible Plan participants who elected such payments and the purchase of annuity contracts for $31.1 million to the remaining participants. These settlements were paid using Plan assets and resulted in a settlement loss of $0.4 million. No further contributions to the Plan were necessary.

Benefit Obligations and Plan Assets
The following table summarizes the changes in the U.S. pension plan obligations and plan assets and includes a statement of the plans' funded status as of March 31, 2024 and 2023:
March 31,
 (In thousands)20242023
Change in benefit obligation:
Projected benefit obligation at beginning of period$3,646 $51,507 
Interest cost152 423 
Actuarial gain(47)(2,044)
Benefits paid(370)(46,240)
Projected benefit obligations at end of year$3,381 $3,646 
Change in plan assets:
Fair value of plan assets at beginning of period$18 $48,708 
Actual return on plan assets— (2,820)
Employer contribution370 370 
Benefits paid(370)(1,371)
Settlements paid with termination of qualified plan(18)(44,869)
Fair value of plan assets at end of year$— $18 
Funded status at end of year$(3,381)$(3,628)

Amounts recognized in the balance sheet at the end of the period consist of the following:
March 31,
 (In thousands)20242023
Noncurrent asset$— $18 
Current liability361 362 
Long-term liability3,020 3,284 
Total liabilities$3,381 $3,646 
Total net liability$(3,381)$(3,628)

The primary components of Net Periodic Benefit Cost (Income) consist of the following:
Year Ended March 31,
 (In thousands)202420232022
Interest cost$152 $423 $1,107 
Expected return on assets— (252)(1,163)
Net periodic benefit cost (income)$152 $171 $(56)

The following table provides information regarding our pension plans with an accumulated benefit obligation and a projected benefit obligation in excess of plan assets:

March 31,
 (In thousands)20242023
Accumulated benefit obligation$3,381 $3,646 
Fair value of plan assets— 18 
Projected benefit obligations$3,381 $3,646 
Fair value of plan assets— 18 
The pension benefit obligation amounts stated above are made up entirely of our unfunded plan.

The following table includes amounts that are expected to be contributed to the unfunded plan by the Company. It reflects benefit payments that are made directly from the Company's assets. The amounts in the table are actuarially determined and reflect the Company's best estimate given its current knowledge; actual amounts could be materially different.
 (In thousands)Pension Benefits
Employer contributions:
2025 (expectation) to participant benefits$361 
Expected benefit payments year ending March 31,
2025$361 
2026352 
2027340 
2028327 
2029313 
2030-20331,352 

Prior to the termination of the Plan, the Company's primary investment objective for its qualified pension plan assets was to provide a source of retirement income for the Plan's participants and beneficiaries. There were no plan assets as of March 31, 2024 and all assets at March 31, 2023 were held in cash.

The following tables show the unrecognized actuarial gain included in accumulated other comprehensive income (loss) at March 31, 2024, 2023 and 2022:

 (In thousands)
Balances in accumulated other comprehensive loss as of March 31, 2022:
Unrecognized actuarial (gain)$(1,522)
Unrecognized prior service credit— 
Balances in accumulated other comprehensive loss as of March 31, 2023:
Unrecognized actuarial (gain)$(930)
Unrecognized prior service credit— 
Balances in accumulated other comprehensive loss as of March 31, 2024:
Unrecognized actuarial (gain)$(942)
Unrecognized prior service credit— 

Assumptions used in determining the actuarial present value of the net periodic benefit cost (income) for the fiscal years ended March 31, 2024, 2023 and 2022 were as follows:
March 31,
20242023 *2022
Key assumptions:
Discount rate
  4.88%
3.26% to 3.48%
2.58% to 2.95%
Expected return on plan assets, net of administrative fees—%2.75%2.25%
*The qualified plan was remeasured at April 30, 2022 for settlement accounting, at which point a discount rate of 3.98% and an expected return assumption of 2.75% were selected and used to determine the net periodic benefit cost (income) for the remainder of the fourth quarter of fiscal 2023.
Assumptions used in determining the actuarial present value of the benefit obligation as of March 31, 2024 and 2023 were as follows:
March 31,
20242023
Key assumptions:
Discount rate
4.88%
4.47%

In fiscal 2023 and 2022, the determination of the expected long-term rate of return was derived from an optimized portfolio using an asset allocation software program. The risk and return assumptions, along with the correlations between the asset classes, were entered into the program. In fiscal 2024, no long-term rate of return is expected due to the termination of the Plan.