Notes, Loans and Finance Leases Payable, net (Long-term Debt Borrowings) (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2023	Mar. 31, 2023
Debt instrument, maturities:
Debt Instrument Carrying Amount	$ 6,051,219	$ 5,710,735
Notes, loans and finance/capital leases payable	6,471,405	6,143,350
Less: Debt issuance costs	(34,096)	(35,308)
Total notes, loans and finance/capital leases payable, net	$ 6,437,309	6,108,042
Real estate loan (amortizing term) [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	5.90%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2027
Debt instrument, maturity year range, end	2037
Debt Instrument Carrying Amount	$ 280,737	289,647
Real estate loan (amortizing term) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	4.30%
Real estate loan (amortizing term) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	6.82%
Senior mortgages
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	4.19%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2024
Debt instrument, maturity year range, end	2042
Debt Instrument Carrying Amount	$ 2,435,443	2,371,231
Senior mortgages | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.70%
Senior mortgages | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	5.66%
Real estate loans (revolving credit) [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	0.00%
Debt instrument, maturities:
Debt instrument, maturity year range, end	2027
Debt Instrument Carrying Amount	$ 0	0
Fleet loans (amortizing term) [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	3.79%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2024
Debt instrument, maturity year range, end	2029
Debt Instrument Carrying Amount	$ 79,874	111,856
Fleet loans (amortizing term) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.61%
Fleet loans (amortizing term) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	5.68%
Fleet loans (revolving credit) [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	6.24%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2026
Debt instrument, maturity year range, end	2028
Debt Instrument Carrying Amount	$ 605,000	615,000
Fleet loans (revolving credit) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.36%
Fleet loans (revolving credit) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	6.70%
Capital Leases (rental equipment) [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	4.06%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2024
Debt instrument, maturity year range, end	2026
Debt Instrument Carrying Amount	$ 137,039	223,205
Capital Leases (rental equipment) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.49%
Capital Leases (rental equipment) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	5.01%
Finance capital lease [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	4.60%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2024
Debt instrument, maturity year range, end	2031
Debt Instrument Carrying Amount	$ 1,660,443	1,255,763
Finance capital lease [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.60%
Finance capital lease [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	6.48%
Private Placement
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	2.65%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2029
Debt instrument, maturity year range, end	2035
Debt Instrument Carrying Amount	$ 1,200,000	1,200,000
Private Placement | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.43%
Private Placement | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.88%
Other obligations
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	6.16%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2024
Debt instrument, maturity year range, end	2049
Debt Instrument Carrying Amount	$ 72,869	$ 76,648
Other obligations | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	1.50%
Other obligations | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	8.00%