Graham Corporation Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Stock Compensation Plans - Schedule of Time-Vesting Restricted Stock Units ("RSUs") and Performance-Vesting Restricted Stock Units ("PSUs") Granted (Detail)

Stock Compensation Plans - Schedule of Time-Vesting Restricted Stock Units ("RSUs") and Performance-Vesting Restricted Stock Units ("PSUs") Granted (Detail) - shares
shares in Thousands

12 Months Ended

Mar. 31, 2026

Mar. 31, 2025

Mar. 31, 2024

Time Vesting Restricted Stock Units (RSUs) [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Restricted stock awarded

Performance Vesting Performance Stock Units (PSUs) [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Restricted stock awarded

Director [Member] | Time Vesting Restricted Stock Units (RSUs) [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Restricted stock awarded

^[1]

Director [Member] | Performance Vesting Performance Stock Units (PSUs) [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Restricted stock awarded

^[1]

Officers and Key Employees [Member] | Time Vesting Restricted Stock Units (RSUs) [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Restricted stock awarded

^[1]

Officers and Key Employees [Member] | Performance Vesting Performance Stock Units (PSUs) [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Restricted stock awarded

^[1]

Officers and Key Employees [Member] | Time Vest One-Third Per Year [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Restricted stock awarded

^[1]

Officers and Key Employees [Member] | Performance Vest One-Third Per Year [Member]

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Restricted stock awarded

^[1]

[1]	Subject to the terms of the applicable award.

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details