Borrowings (Table Text Block)	12 Months Ended
	Mar. 31, 2023
Debt Instruments [Abstract]
Long-Term Debt	March 31,   2023 Rates   Maturities   2023   2022                     (In thousands) Real estate loan (amortizing term) (a) 4.29 % - 6.14 % 2027   2037 $ 289,647 $ 50,259 Senior mortgages 2.70 % - 5.50 % 2024 - 2042   2,371,231   2,206,268 Real estate loans (revolving credit) – % - – %     2027   –   535,000 Fleet loans (amortizing term) 1.61 % - 5.68 % 2023 - 2029   111,856   124,651 Fleet loans (revolving credit) 2.36 % - 5.97 % 2025 - 2027   615,000   560,000 Finance leases (rental equipment) 2.18 % - 5.04 % 2023 - 2026   223,205   347,393 Finance liability (rental equipment) 1.60 % - 5.98 % 2024 - 2031   1,255,763   949,936 Private placements 2.43 % - 2.88 % 2029 - 2035   1,200,000   1,200,000 Other obligations 1.50 % - 8.00 % 2023 - 2049   76,648   86,206 Notes, loans and finance leases payable                 $ 6,143,350 $ 6,059,713 Less: Debt issuance costs                   (35,308)   (37,216) Total notes, loans and finance leases payable, net    $ 6,108,042 $ 6,022,497
Annual Maturities of Notes, Loans and Leases Payable	Years Ended March 31,     2024   2025   2026   2027   2028   Thereafter   Total     (In thousands) Notes, loans and finance leases payable, secured$ 563,153 $ 698,301 $ 667,490 $ 819,153 $ 647,409 $ 2,747,844 $ 6,143,350