Notes, Loans and Finance Leases Payable, net (Long-term Debt Borrowings) (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2025	Mar. 31, 2025
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	5.19%
Debt instrument, maturities:
Debt Instrument Carrying Amount	$ 7,462,822	$ 6,703,510
Notes, loans and finance/capital leases payable	8,058,179	7,229,341
Less: Debt issuance costs	(40,883)	(35,484)
Total notes, loans and finance/capital leases payable, net	$ 8,017,296	7,193,857
Real estate loan (amortizing term) [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	4.88%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2027
Debt instrument, maturity year range, end	2037
Debt Instrument Carrying Amount	$ 256,977	265,887
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	5.35%
Senior mortgages
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	4.69%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2026
Debt instrument, maturity year range, end	2042
Debt Instrument Carrying Amount	$ 2,839,587	2,437,769
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	6.05%
Real estate loans (revolving credit) [Member]
Debt instrument, maturities:
Debt instrument, maturity year range, end	2027
Fleet loans (amortizing term) [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	5.37%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2026
Debt instrument, maturity year range, end	2033
Debt Instrument Carrying Amount	$ 154,964	125,839
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	6.02%
Fleet loans (revolving credit) [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	5.14%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2028
Debt instrument, maturity year range, end	2030
Debt Instrument Carrying Amount	$ 635,000	625,000
Fleet loans (revolving credit) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	4.77%
Fleet loans (revolving credit) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	5.27%
Capital Leases (rental equipment) [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	4.25%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2026
Debt instrument, maturity year range, end	2026
Debt Instrument Carrying Amount	$ 11,437	44,338
Capital Leases (rental equipment) [Member] | Minimum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	2.89%
Capital Leases (rental equipment) [Member] | Maximum [Member]
Debt instruments, interest rate, stated percentage:
Debt instrument, interest rate, stated percentage	4.66%
Finance capital lease [Member]
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	5.19%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2025
Debt instrument, maturity year range, end	2033
Debt Instrument Carrying Amount	$ 2,395,416	1,963,644
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	6.80%
Private Placement
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	3.62%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2029
Debt instrument, maturity year range, end	2035
Debt Instrument Carrying Amount	$ 1,700,000	1,700,000
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	6.00%
Other obligations
Debt instruments, interest rate, stated percentage:
Debt Weighted Average Interest Rate	6.41%
Debt instrument, maturities:
Debt instrument, maturity year range, start	2026
Debt instrument, maturity year range, end	2049
Debt Instrument Carrying Amount	$ 64,798	$ 66,864
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%