Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues:
Self-moving equipment rentals	$ 1,087,348	$ 1,069,405	$ 2,101,680	$ 2,068,611
Self-storage revenues	224,519	208,890	440,256	407,851
Self moving and self-storage products and service sales	87,763	91,571	184,354	192,443
Property management fees	9,586	9,267	19,081	18,444
Life insurance premiums	20,488	22,498	41,228	45,629
Property and casualty insurance premiums	25,767	25,571	46,996	45,893
Net investment and Interest income	37,794	64,738	74,919	129,330
Other revenue	164,843	157,920	298,084	281,967
Total revenues	1,658,108	1,649,860	3,206,598	3,190,168
Costs and expenses:
Operating Costs and Expenses	891,073	835,258	1,680,830	1,598,499
Commission expenses	119,008	111,961	231,579	218,888
Cost of product sales	62,250	66,620	128,264	137,295
Benefits and losses	44,392	42,553	88,398	87,897
Amortization of deferred policy acquisition costs	4,439	6,826	9,085	14,871
Lease expense	4,729	8,450	10,334	16,033
Depreciation, net of (gains) losses on disposals	227,270	154,122	443,815	291,936
Net (gains) losses on disposal of real estate	2,991	1,715	6,095	2,736
Operating Expenses, Total	1,356,152	1,227,505	2,598,400	2,368,155
Earnings from operations	301,956	422,355	608,198	822,013
Other components of net periodic benefit costs	(372)	(364)	(744)	(729)
Interest Income, Other	16,131		34,366	0
Interest expense	(71,498)	(63,943)	(138,716)	(124,541)
Fees and amortization on early extinguishment of debt			(495)	0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	246,217	358,048	502,609	696,743
Income tax expense	(59,419)	(84,540)	(120,394)	(166,397)
Earnings available to common stockholders	$ 186,798	$ 273,508	$ 382,215	$ 530,346
Common Stock [Member]
Costs and expenses:
Basic and diluted earnings per common share	$ 0.91	$ 1.36	$ 1.86	$ 2.63
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	$ 186,798	$ 273,508	$ 382,215	$ 530,346
Basic and diluted earnings per common share	$ 0.96	$ 1.4	$ 1.96	$ 2.71
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:
Weighted average common shares outstanding: basic and diluted	196,077,880	196,077,880	196,077,880	196,077,880