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Changes in Mortgage Loans (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Mortgage Loans On Real Estate [Abstract] |  |  |
Balance at beginning of period | $ 209,566 | $ 297,451 | $ 442,826
Additions during period: |  |  |
Interest | 18,285 | 20,807 | 28,116
Accretion of discount | 0 | 0 | 269
Deductions during period: |  |  |
Provision for loan loss reserve | (15,544) | (11,422) | (61,000)
Collections of principal and interest | (92,177) | (97,270) | (112,760)
Balance at close of period | $ 120,130 | $ 209,566 | $ 297,451

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- Definition Deductions during period. + References No definition available. + Details
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- Definition The amount of accretion of discount recorded on mortgage loans on real estate during the reporting period. + References No definition available. + Details
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- Definition The amount of principal and interest collected on mortgage loans on real estate during the reporting period. + References No definition available. + Details
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- Definition Mortgage loans on real estate loan loss reserves. + References No definition available. + 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=6589523&loc=d3e617274-123014 + Details
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- Definition Amount of addition to 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, classified as other. + 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(Footnote 6)) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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