Fair Value Measurements (Carrying and Estimated Fair Values within Fair Value Hierarchy) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024
Assets
Receivables, Fair Value Disclosure	$ 215,735	$ 177,602
Mortgage loans, net	589,880	579,767
Other investments	12,389	18,917
Total	818,004	776,286
Liabilities
Notes, loans and leases payable, gross	5,888,119	5,850,346
Total	5,888,119	5,850,346
Level 2 [Member]
Liabilities
Notes, loans and leases payable, gross	5,888,119	5,850,346
Total	5,888,119	5,850,346
Level 3 [Member]
Assets
Receivables, Fair Value Disclosure	215,735	177,602
Mortgage loans, net	589,880	579,767
Other investments	12,389	18,917
Total	818,004	776,286
Carrying Value [Member]
Assets
Receivables, Fair Value Disclosure	215,735	177,602
Mortgage loans, net	617,230	604,481
Other investments	12,389	18,917
Total	845,354	801,000
Liabilities
Notes, loans and leases payable, gross	6,311,676	6,304,038
Total	$ 6,311,676	$ 6,304,038