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Real Estate (Real Estate and Accumulated Depreciation) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cost |  |  |  |
Balance, beginning of year |  | $ 1,527,478,000 | $ 1,515,206,000 |
Properties transferred to held for sale |  | (184,639,000) | (22,512,000) | $ (36,265,000)
Outparcel dispositions |  | (387,000) | (840,000) |
Property impairments |  | (83,224,000) |  |
Improvements and betterments |  | 29,296,000 | 35,624,000 | 37,089,000
Balance, end of the year |  | 1,288,524,000 | 1,527,478,000 | 1,515,206,000
Accumulated depreciation |  |  |  |
Balance, beginning of the year |  | 428,569,000 | 389,861,000 |
Properties transferred held for sale |  | (55,165,000) | (3,947,000) | (10,143,000)
Outparcel dispositions |  |  | (90,000) |
Depreciation expense | [1] | 36,338,000 | 42,745,000 | 41,142,000
Balance, end of the year |  | 409,742,000 | 428,569,000 | 389,861,000
Net book value |  | $ 878,782,000 | $ 1,098,909,000 | $ 1,125,345,000
[1] | Depreciation is provided over the estimated useful lives of the buildings and improvements, which range from 3 to 40 years.

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- Definition Real estate accumulated depreciation property transferred to held for sale. + References No definition available. + Details
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- Definition Real estate investment property accumulated depreciation. + References No definition available. + Details
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- Definition Real estate property impairments. + References No definition available. + Details
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- Definition Real estate property outparcel dispositions. + References No definition available. + Details
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- Definition Amount of increase in real estate investments related to improvements for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Footnote 4)) -URI http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024 + Details
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- Definition The cumulative amount of depreciation for real estate property held for investment purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(3)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Amount of depreciation expense of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Footnote 4)) -URI http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024 + Details
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