Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Revenues:
Self-moving equipment rentals	$ 878,585	$ 839,801	$ 2,980,265	$ 2,908,412
Self-storage revenues	227,125	210,517	667,381	618,368
Self moving and self-storage products and service sales	70,407	70,344	254,761	262,787
Property management fees	8,869	10,138	27,950	28,582
Life insurance premiums	22,926	22,574	64,154	68,203
Property and casualty insurance premiums	28,364	26,490	75,360	72,383
Net investment and Interest income	40,536	57,457	115,455	186,787
Other revenue	111,746	102,193	409,830	384,160
Total revenues	1,388,558	1,339,514	4,595,156	4,529,682
Costs and expenses:
Operating Costs and Expenses	782,351	770,405	2,463,181	2,368,904
Commission expenses	95,031	87,955	326,610	306,843
Cost of product sales	52,767	51,536	181,031	188,831
Benefits and losses	48,683	42,495	137,081	130,392
Amortization of deferred policy acquisition costs	4,493	4,155	13,578	19,026
Lease expense	5,052	9,148	15,386	25,181
Depreciation, net of (gains) losses on disposals	246,091	173,648	689,906	465,584
Net (gains) losses on disposal of real estate	3,358	2,584	9,453	5,320
Operating Expenses, Total	1,237,826	1,141,926	3,836,226	3,510,081
Earnings from operations	150,732	197,588	758,930	1,019,601
Other components of net periodic benefit costs	(372)	(365)	(1,116)	(1,094)
Interest Income, Other	15,638		50,004	0
Interest expense	(76,581)	(67,450)	(215,297)	(191,991)
Fees and amortization on early extinguishment of debt			(495)	0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	89,417	129,773	592,026	826,516
Net earnings, Tax	(22,251)	(30,549)	(142,645)	(196,946)
Earnings available to common stockholders	$ 67,166	$ 99,224	$ 449,381	$ 629,570
Common Stock [Member]
Costs and expenses:
Basic and diluted earnings per common share	$ 0.3	$ 0.46	$ 2.16	$ 3.09
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	$ 67,166	$ 99,224	$ 449,381	$ 629,570
Basic and diluted earnings per common share	$ 0.35	$ 0.51	$ 2.31	$ 3.22
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