Borrowings (Table Text Block)	12 Months Ended
	Mar. 31, 2020
Debt Instruments [Abstract]
Long-Term Debt	March 31,   2020 Rates (a)   Maturities   2020   2019                   (In thousands) Real estate loan (amortizing term)     2.36 %     2023 $ 92,913 $ 102,913 Senior mortgages 3.11 % 6.62 % 2021 - 2038   2,029,878   1,741,652 Real estate loans (revolving credit) 2.98 % 3.14 % 2022 - 2025   519,000   429,400 Fleet loans (amortizing term) 1.95 % 4.66 % 2020 - 2027   224,089   263,209 Fleet loans (revolving credit) 2.73 % 2.75 % 2022 - 2024   567,000   530,000 Finance/capital leases (rental equipment) 1.92 % 5.04 % 2020 - 2026   734,870   1,042,652 Finance liability (rental equipment) 2.63 % 4.22 % 2024 - 2027   398,834   – Other obligations 2.50 % 8.00 % 2020 - 2049   84,484   82,417 Notes, loans and finance/capital leases payable               $ 4,651,068 $ 4,192,243 Less: Debt issuance costs                 (29,777)   (28,920) Total notes, loans and finance/capital leases payable, net               $ 4,621,291 $ 4,163,323                         (a) Interest rate as of March 31, 2020, taking into account the effect of applicable hedging instruments
Annual Maturities of Notes, Loans and Leases Payable	Years Ended March 31,     2021   2022   2023   2024   2025   Thereafter   Total     (In thousands) Notes, loans and finance/capital leases payable, secured $ 459,184 $ 510,933 $ 1,011,688 $ 755,025 $ 393,498 $ 1,520,740 $ 4,651,068