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INCOME TAXES - Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
INCOME TAXES
Statutory federal income tax rate	21.00%	21.00%	21.00%
State and local income tax rate	4.00%	5.20%	3.00%
Employee Stock Ownership Plan ("ESOP") market value adjustment	(0.20%)	(0.50%)	(0.10%)
BOLI	(3.20%)	(4.80%)	(0.80%)
Other, net	(0.20%)	(3.10%)	0.60%
Effective federal income tax rate	21.40%	17.80%	23.70%

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- Definition

Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to life insurance expense.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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