Borrowings (Table Text Block)	12 Months Ended
	Mar. 31, 2022
Debt Instruments [Abstract]
Long-Term Debt	March 31,   2022 Rates   Maturities   2022   2021                     (In thousands) Real estate loan (amortizing term)       1.83 %     2023 $ 50,259 $ 82,913 Senior mortgages 2.70 % - 5.50 % 2023 - 2042   2,206,268   2,125,324 Real estate loans (revolving credit) (a) 1.58 % - 3.14 % 2023 - 2025   535,000   535,000 Fleet loans (amortizing term) 1.61 % - 4.66 % 2022 - 2028   124,651   176,295 Fleet loans (revolving credit) 1.30 % - 2.36 % 2024 - 2026   560,000   535,000 Finance leases (rental equipment) 2.16 % - 5.04 % 2022 - 2026   347,393   513,623 Finance liability (rental equipment) 1.60 % - 4.68 % 2024 - 2030   949,936   644,375 Private placements 2.43 % - 2.88 % 2029 - 2035   1,200,000   – Other obligations 1.50 % - 8.00 % 2022 - 2049   86,206   86,085 Notes, loans and finance leases payable                 $ 6,059,713 $ 4,698,615 Less: Debt issuance costs                   (37,216)   (29,708) Total notes, loans and finance leases payable, net         $ 6,022,497 $ 4,668,907                           (a) Certain loans have interest rate swaps fixing the rate between 3.03% and 3.14% based on current margin
Annual Maturities of Notes, Loans and Leases Payable	Years Ended March 31,     2023   2024   2025   2026   2027   Thereafter   Total     (In thousands) Notes, loans and finance leases payable, secured$ 478,954 $ 937,542 $ 898,740 $ 570,127 $ 559,961 $ 2,614,389 $ 6,059,713