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Property Dispositions and Discontinued Operations - Additional Information (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) Property | Dec. 31, 2015 USD ($) Property | Dec. 31, 2014 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Proceeds from sale of property | $ 370,038 | $ 156,461 | $ 226,375
Aggregate gain on sale of properties | 81,510 | 24,884 | 57,507
Impairment charges on real estate | 73,772 | 34,857 | 45,004
Gain (loss) on debt extinguishment on sale of properties | $ (532) | $ 21,498 | (671)
Properties classified as held-for-sale (in number of properties) | Property | 2 | 2 |
Other asset impairment charges | $ 26,423 | $ 1,975 | 3,596
LCIF [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Proceeds from sale of property | 238,891 |  | 40,836
Aggregate gain on sale of properties | 36,380 | 0 | 17,944
Impairment charges on real estate | 72,072 | $ 787 |
Gain (loss) on debt extinguishment on sale of properties | $ 7,388 |  |
Properties classified as held-for-sale (in number of properties) | Property | 0 | 0 |
Impaired, interest income |  | $ 14 | 1,752
Greenville, South Carolina [Member] | LCIF [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Proceeds from sale of property |  |  | 11,491
Southfield, Michigan [Member] | LCIF [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Provision for loan losses |  |  | $ 2,500
Land [Member] | New York, New York [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Impairment charges on real estate | $ 65,500 |  |
Number of properties sold | Property | 3 |  |
Land [Member] | New York, New York [Member] | LCIF [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Impairment charges on real estate | $ 65,500 |  |
Number of properties sold | Property | 3 |  |

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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition The gross interest income that would have been recorded in the period on troubled debt restructurings, if the loans had been current in accordance with their original terms and had been outstanding throughout the period or since origination, if held for part of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18794-111554 + Details
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