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Schedule III - Real Estate and Accumulated Depreciation and Amortization - Summary (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Real Estate and Accumulated Depreciation [Line Items] |  |  |
Total cost basis for federal income tax purposes | $ 4,400,000 |  |
Reconciliation of real estate owned: |  |  |
Balance at the beginning of year | 3,789,711 | $ 3,671,560 | $ 3,812,294
Additions during year | 291,004 | 478,717 | 210,143
Properties sold during year | (527,597) | (343,976) | (347,569)
Other reclassifications | (19,946) | (16,590) | (3,308)
Balance at end of year | 3,533,172 | 3,789,711 | 3,671,560
Reconciliation of accumulated depreciation and amortization: |  |  |
Balance at the beginning of year | 812,207 | 795,486 | 775,617
Depreciation and amortization expense | 128,384 | 124,618 | 119,156
Accumulated depreciation and amortization of properties sold, impaired and held for sale during year | (86,428) | (106,268) | (98,698)
Other reclassifications | (9,232) | (1,629) | (589)
Balance at end of year | 844,931 | 812,207 | 795,486
LCIF [Member] |  |  |
Real Estate and Accumulated Depreciation [Line Items] |  |  |
Total cost basis for federal income tax purposes | 900,000 |  |
Reconciliation of real estate owned: |  |  |
Balance at the beginning of year | 1,061,606 | 910,113 | 892,621
Additions during year | 49,417 | 152,280 | 58,511
Properties sold during year | (379,821) | (787) | (41,016)
Other reclassifications | 0 | 0 | (3)
Balance at end of year | 731,202 | 1,061,606 | 910,113
Reconciliation of accumulated depreciation and amortization: |  |  |
Balance at the beginning of year | 199,690 | 176,167 | 172,965
Depreciation and amortization expense | 26,989 | 23,523 | 21,837
Accumulated depreciation and amortization of properties sold, impaired and held for sale during year | (44,174) | 0 | (18,635)
Balance at end of year | $ 182,505 | $ 199,690 | $ 176,167

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- Definition Amount of accumulated depreciation pertaining to 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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28.FN4) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule III) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 + Details
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- Definition Amount of other deductions to accumulated depreciation, excluding sales, for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28.FN4) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule III) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 + Details
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