Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Revenues:
Self-moving equipment rentals	$ 999,206	$ 1,090,775
Self-storage revenues	198,961	173,177
Self moving and self-storage products and service sales	100,872	109,351
Property management fees	9,177	9,139
Life insurance premiums	23,131	25,781
Property and casualty insurance premiums	20,322	19,972
Investment income interest and dividend	64,592	33,573
Other revenue	124,047	136,072
Total revenues	1,540,308	1,597,840
Costs and expenses:
Operating expenses	763,241	733,167
Commission expenses	106,927	118,493
Cost of sales	70,675	79,671
Benefits and losses	45,344	39,757
Amortization of deferred policy acquisition costs	8,045	7,672
Lease expense	7,583	7,475
Depreciation, net of (gains) losses on disposals	137,814	113,796
Net (gains) losses on disposal of real estate	1,021	2,307
Total costs and expenses	1,140,650	1,102,338
Earnings from operations	399,658	495,502
Other components of net periodic benefit costs	(365)	(304)
Interest expense	(60,598)	(49,799)
Pretax earnings	338,695	445,399
Income tax expense	(81,857)	(107,054)
Earnings available to common stockholders	256,838	338,345
Common Stock [Member]
Costs and expenses:
Earnings available to common stockholders	$ 0	$ 0
Basic and diluted earnings per common share	$ 1.27	$ 2.18
Weighted average common shares outstanding: basic and diluted	19,607,788	19,607,788
Nonvoting Common Stock [Member]
Costs and expenses:
Earnings available to common stockholders	$ 0	$ 0
Basic and diluted earnings per common share	$ 1.31	$ 1.68
Weighted average common shares outstanding: basic and diluted	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