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EMPLOYEE BENEFITS - Change in plan assets (Details) - CAD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Accrued benefit obligations:
Net defined benefit liability (asset) at beginning of period	$ 24,585
Net defined benefit liability (asset) at end of period	25,805	$ 24,585
Present value of defined benefit obligation [member]
Accrued benefit obligations:
Net defined benefit liability (asset) at beginning of period	28,382	29,162
Interest cost	986	1,015
Service cost	921	610
Assumption changes	133	561
Transfers and benefits paid	(2,156)	(2,590)
Exchange and other adjustments	1,394	(376)
Net defined benefit liability (asset) at end of period	29,660	28,382
Plan assets [member]
Accrued benefit obligations:
Net defined benefit liability (asset) at beginning of period	3,797	3,676
Interest cost	(28)	125
Exchange and other adjustments	86	(4)
Net defined benefit liability (asset) at end of period	$ 3,855	$ 3,797

X

- Definition

Decrease (Increase) in Net Defined Benefit Liability (Asset) Resulting From Transfers and Benefits Paid

+ References

No definition available.

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- Definition

The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 141
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- References

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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 141
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- Definition

The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 141
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- Definition

The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]]

+ References

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