Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Self-moving equipment rentals	$ 839,801	$ 898,819	$ 2,908,412	$ 3,151,619
Self-storage revenues	210,517	190,483	618,368	549,246
Self moving and self-storage products and service sales	70,344	74,851	262,787	281,066
Property management fees	10,138	10,080	28,582	28,496
Life insurance premiums	22,574	24,399	68,203	75,636
Property and casualty insurance premiums	26,490	26,852	72,383	72,542
Net investment and Interest income	57,457	52,294	186,787	116,376
Other revenue	102,193	97,558	384,160	401,059
Total revenues	1,339,514	1,375,336	4,529,682	4,676,040
Costs and expenses:
Operating expenses	770,405	733,469	2,368,904	2,278,230
Commission expenses	87,955	95,980	306,843	339,814
Cost of sales	51,536	54,616	188,831	206,912
Benefits and losses	42,495	41,764	130,392	121,033
Amortization of deferred policy acquisition costs	4,155	6,979	19,026	21,623
Lease expense	9,148	7,792	25,181	22,951
Depreciation, net of (gains) losses on disposals	173,648	113,866	465,584	344,980
Net (gains) losses on disposal of real estate	2,584	859	5,320	5,038
Total costs and expenses	1,141,926	1,055,325	3,510,081	3,340,581
Earnings from operations	197,588	320,011	1,019,601	1,335,459
Other components of net periodic benefit costs	(365)	(304)	(1,094)	(912)
Interest expense	(67,450)	(59,041)	(191,991)	(166,033)
Fees and amortization on early extinguishment of debt	0	(50)	0	(1,009)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	129,773	260,616	826,516	1,167,505
Income tax expense	(30,549)	(61,764)	(196,946)	(280,442)
Earnings available to common stockholders	99,224	198,852	629,570	887,063
Common Stock [Member]
Costs and expenses:
Earnings available to common stockholders	$ 0	$ 0	$ 0	$ 0
Basic and diluted earnings per common share	$ 0.46	$ 0.98	$ 3.09	$ 5.39
Weighted average common shares outstanding: basic and diluted	19,607,788	19,607,788	19,607,788	19,607,788
Nonvoting Common Stock [Member]
Costs and expenses:
Earnings available to common stockholders			$ 629,570	$ 887,063
Basic and diluted earnings per common share	$ 0.51	$ 1.02	$ 3.22	$ 4.43
Weighted average common shares outstanding: basic and diluted	176,470,092	176,470,092	176,470,092	176,470,092
Nonvoting Common Stock [Member] | Common Stock [Member]
Costs and expenses:
Earnings available to common stockholders	$ 0	$ 0	$ 0	$ 0
Weighted average common shares outstanding: basic and diluted	196,077,880	196,077,880	196,077,880	196,077,880