Notes Payable and Derivatives (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Mar. 31, 2021
Debt Instrument [Line Items]
Long-term debt maturities for the next five years		$ 1,900,000
Notes Payable
Debt Instrument [Line Items]
Stated Rate			3.30%
2024 Notes
Debt Instrument [Line Items]
Principal		350,000
Discount	[1]	707
Net Price		$ 349,293
Stated Rate		3.90%
Effective Rate	[2]	3.924%
2025 Notes
Debt Instrument [Line Items]
Principal		$ 400,000
Discount	[1]	964
Net Price		$ 399,036
Stated Rate		4.00%
Effective Rate	[2]	4.029%
2026 Notes
Debt Instrument [Line Items]
Principal		$ 350,000
Discount	[1]	3,860
Net Price		$ 346,140
Stated Rate		3.60%
Effective Rate	[2]	3.733%
2027 Notes
Debt Instrument [Line Items]
Principal		$ 400,000
Discount	[1]	1,628
Net Price		$ 398,372
Stated Rate		3.50%
Effective Rate	[2]	3.548%
2028 Notes
Debt Instrument [Line Items]
Principal		$ 400,000
Discount	[1]	2,848
Net Price		$ 397,152
Stated Rate		4.30%
Effective Rate	[2]	4.388%
2030 Notes
Debt Instrument [Line Items]
Principal		$ 400,000
Discount	[1]	1,288
Net Price		$ 398,712
Stated Rate		2.50%
Effective Rate	[2]	2.536%
2033 Notes
Debt Instrument [Line Items]
Principal		$ 500,000
Discount	[1]	11,620
Net Price		$ 488,380
Stated Rate		5.60%
Effective Rate	[2]	5.905%
2048 Notes
Debt Instrument [Line Items]
Principal		$ 300,000
Discount	[1]	4,239
Net Price		$ 295,761
Stated Rate		4.80%
Effective Rate	[2]	4.89%
2050 Notes
Debt Instrument [Line Items]
Principal		$ 300,000
Discount	[1]	6,066
Net Price		$ 293,934
Stated Rate		3.10%
Effective Rate	[2]	3.205%
2051 Notes
Debt Instrument [Line Items]
Principal		$ 450,000
Discount	[1]	8,406
Net Price		$ 441,594
Stated Rate		3.50%
Effective Rate	[2]	3.602%
2052 Notes
Debt Instrument [Line Items]
Principal		$ 450,000
Discount	[1]	10,422
Net Price		$ 439,578
Stated Rate		3.00%
Effective Rate	[2]	3.118%

[1] The note discounts are amortized to interest expense over the respective term of each debt obligation using the effective interest method.

[2] Includes the effects of the discount at issuance.