Fair Value Measurements (Carrying and Estimated Fair Values within Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Mar. 31, 2024
Assets
Receivables, Fair Value Disclosure	$ 144,547	$ 177,602
Mortgage loans, net	577,381	579,767
Other investments	12,682	18,917
Total	734,610	776,286
Liabilities
Notes, loans and leases payable, gross	6,444,590	5,850,346
Total	6,444,590	5,850,346
Level 2 [Member]
Liabilities
Notes, loans and leases payable, gross	6,444,590	5,850,346
Total	6,444,590	5,850,346
Level 3 [Member]
Assets
Receivables, Fair Value Disclosure	144,547	177,602
Mortgage loans, net	577,381	579,767
Other investments	12,682	18,917
Total	734,610	776,286
Carrying Value [Member]
Assets
Receivables, Fair Value Disclosure	144,547	177,602
Mortgage loans, net	604,615	604,481
Other investments	12,682	18,917
Total	761,844	801,000
Liabilities
Notes, loans and leases payable, gross	6,929,591	6,304,038
Total	$ 6,929,591	$ 6,304,038