Related Party Transations (Table Text Block)

9 Months Ended

Dec. 31, 2023

Related Party Revenue [Abstract]

Related Party Revenue

	Quarter ended December 31,
	2023		2022
	(Unaudited)
	(In thousands)
U-Haul management fee revenue from Blackwater	$	7,135	$	7,170
U-Haul management fee revenue from Mercury		3,003		2,910
	$	10,138	$	10,080

	Nine months ended December 31,
	2023		2022
	(Unaudited)
	(In thousands)
U-Haul management fee revenue from Blackwater	$	22,585	$	22,726
U-Haul management fee revenue from Mercury		5,997		5,770
	$	28,582	$	28,496

Related Party costs and expenses

	Quarter ended December 31,
	2023		2022
	(Unaudited)
	(In thousands)
U-Haul lease expenses to Blackwater	$	604	$	604
U-Haul printing expenses to Blackwater		877		—
U-Haul commission expenses to Blackwater		18,946		20,016
	$	20,427	$	20,620

	Nine months ended December 31,
	2023		2022
	(Unaudited)
	(In thousands)
U-Haul lease expenses to Blackwater	$	1,812	$	1,812
U-Haul printing expenses to Blackwater		2,194		—
U-Haul commission expenses to Blackwater		65,684		71,283
	$	69,690	$	73,095

Related party assets

	December 31,			March 31,
	2023			2023
	(Unaudited)
	(In thousands)
U-Haul receivable from Blackwater	$	41,674		$	42,141
U-Haul receivable from Mercury		13,711			8,402
Other (a)		(6,619	)		(2,235	)
	$	48,766		$	48,308

(a)Timing differences for intercompany balances with insurance subsidiaries resulting from the three-month difference in reporting periods.