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Fair Value Measurements (Carrying and Estimated Fair Values within Fair Value Hierarchy) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Mar. 31, 2024
--- | --- | ---
Assets |  |
Receivables, Fair Value Disclosure | $ 179,765 | $ 177,602
Mortgage loans, net | 592,630 | 579,767
Other investments | 12,641 | 18,917
Total | 785,036 | 776,286
Liabilities |  |
Notes, loans and leases payable, gross | 6,371,562 | 5,850,346
Total | 6,371,562 | 5,850,346
Level 2 [Member] |  |
Liabilities |  |
Notes, loans and leases payable, gross | 6,371,562 | 5,850,346
Total | 6,371,562 | 5,850,346
Level 3 [Member] |  |
Assets |  |
Receivables, Fair Value Disclosure | 179,765 | 177,602
Mortgage loans, net | 592,630 | 579,767
Other investments | 12,641 | 18,917
Total | 785,036 | 776,286
Carrying Value [Member] |  |
Assets |  |
Receivables, Fair Value Disclosure | 179,765 | 177,602
Mortgage loans, net | 623,042 | 604,481
Other investments | 12,641 | 18,917
Total | 815,448 | 801,000
Liabilities |  |
Notes, loans and leases payable, gross | 6,794,502 | 6,304,038
Total | $ 6,794,502 | $ 6,304,038

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