Schedule V - U-Haul Holding Company and Consolidated Subsidiaries, Supplemental Information (for Property-Casualty Insurance Operations), Parenthetical (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Investment Income, Net [Abstract]
Written premiums, net	$ 3,200	$ 2,900	$ 3,400
Premiums Earned, Net	89,745	99,149	111,027
Gains Losses on Sales of Investments	157	8,300	11,872
Property Casualty Insurance Operations [Member]
Investment Income, Net [Abstract]
Premiums Earned, Net	3,100	3,000	3,100
Gains Losses on Sales of Investments	$ 0	$ 100	$ 1,000