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Related Party Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Related Party Transaction [Line Items] |  |  |
Rent revenue | $ 359,832 | $ 398,065 | $ 399,485
Vorando Realty Trust [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Rent revenue | 234 | 236 | 255
Rent expense for corporate headquarters | $ 1,179 | 1,176 | 1,323
LCIF [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Redemption of units (in units) | 2,675,785 |  |
Redemption of units | $ 129,990 |  |
Expenses from transactions with related party | 672 | 764 | 905
Rent revenue | 74,707 | 115,403 | 117,847
Rent expense for corporate headquarters | 171 | 286 | 307
General and administration expense | 6,557 | 9,767 | $ 8,618
LCIF [Member] | General Partner [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Issuance of units (in units) |  |  | 12,559,130
Issuance of units |  |  | $ 112,286
LCIF [Member] | Lexington Realty Trust [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Due from (to) related party | (2,422) | 5,967 |
Unit distributions earned | $ 61,072 | 64,319 | 58,361
Redemption of units (in units) | 2,675,785 |  |
Distribution amount (usd per share) | $ 3.25 |  |
Redemption of units | $ 129,990 |  |
Interest expense, related party | 8,237 | 11,392 | $ 12,253
LCIF [Member] | Lexington Realty Trust [Member] | General Partner [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Issuance of units (in units) |  |  | 12,559,130
Issuance of units |  |  | $ 112,286
LCIF [Member] | Vorando Realty Trust [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Rent revenue | 234 | $ 236 | $ 255
LCIF [Member] | Affiliated Entity [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Notes payable, related parties | 8,000 |  |
Notes payable, related parties, potential maximum amount | 12,000 |  |
LCIF [Member] | Affiliated Entity [Member] | Expense Reimbursement [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related party | 105 |  |
LCIF [Member] | Affiliated Entity [Member] | Structuring Fee [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Expenses from transactions with related party | $ 120 |  |

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- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 + Details
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- Definition Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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