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Fair Value Measurements (Carrying and Estimated Fair Values within Fair Value Hierarchy) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Mar. 31, 2021
--- | --- | ---
Assets |  |
Reinsurance recoverables and trade receivables, net | $ 230,437 | $ 224,426
Mortgage loans, net | 494,790 | 391,230
Other investments | 107,581 | 98,529
Total | 832,808 | 714,185
Liabilities |  |
Notes, loans and leases payable, gross | 5,196,104 | 4,449,691
Total | 5,196,104 | 4,449,691
Level 1 [Member] |  |
Assets |  |
Reinsurance recoverables and trade receivables, net | 0 | 0
Mortgage loans, net | 0 | 0
Other investments | 0 | 0
Total | 0 | 0
Liabilities |  |
Notes, loans and leases payable, gross | 0 | 0
Total | 0 | 0
Level 2 [Member] |  |
Assets |  |
Reinsurance recoverables and trade receivables, net | 0 | 0
Mortgage loans, net | 0 | 0
Other investments | 0 | 0
Total | 0 | 0
Liabilities |  |
Notes, loans and leases payable, gross | 5,397,856 | 4,698,615
Total | 5,397,856 | 4,698,615
Level 3 [Member] |  |
Assets |  |
Reinsurance recoverables and trade receivables, net | 230,437 | 224,426
Mortgage loans, net | 494,790 | 391,230
Other investments | 107,581 | 98,529
Total | 832,808 | 714,185
Liabilities |  |
Notes, loans and leases payable, gross | 0 | 0
Total | 0 | 0
Carrying Value [Member] |  |
Assets |  |
Reinsurance recoverables and trade receivables, net | 230,437 | 224,426
Mortgage loans, net | 494,790 | 391,230
Other investments | 107,581 | 98,529
Total | 832,808 | 714,185
Liabilities |  |
Notes, loans and leases payable, gross | 5,397,856 | 4,698,615
Total | $ 5,397,856 | $ 4,698,615

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events, carrying value. + References No definition available. + Details
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- Definition This extended concept is a combination of two concepts on the US-GAAP taxonomy. (1) Reinsurance Recoverables defined as..."The known and estimated amount recoverable as of the balance sheet date from reinsurers for claims paid or incurred by the ceding insurer and associated claims settlement expenses, including estimated amounts for claims incurred but not reported, and policy benefits, net of any related valuation allowance." (2) Receivables, Net, Current defined as..."The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowance established for the purpose of reducing such receivables to an amount that approximates their net realizable value" + References No definition available. + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Column G)) -URI http://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014 + Details
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