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Rental and Other Revenues; Rental Property and Other Expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Real Estate Revenue, Net [Abstract] |  |  |  |  |  |  |  |  |  |  |
Contractual rents, net |  |  |  |  |  |  |  |  | $ 583,825 | $ 561,242 | $ 513,909
Straight-line rental income, net |  |  |  |  |  |  |  |  | 31,721 | 23,909 | 22,054
Cost recovery income, net |  |  |  |  |  |  |  |  | 53,942 | 48,730 | 45,247
Lease termination fees |  |  |  |  |  |  |  |  | 1,501 | 2,311 | 990
Other miscellaneous operating revenues |  |  |  |  |  |  |  |  | 31,748 | 29,442 | 22,471
Real estate revenue, net | $ 175,861 | $ 180,185 | $ 177,283 | $ 169,408 | $ 167,646 | $ 166,269 | $ 166,860 | $ 164,859 | 702,737 | 665,634 | 604,671
Future minimum base rents [Abstract] |  |  |  |  |  |  |  |  |  |  |
2018 | 595,638 |  |  |  |  |  |  |  | 595,638 |  |
2019 | 556,405 |  |  |  |  |  |  |  | 556,405 |  |
2020 | 490,429 |  |  |  |  |  |  |  | 490,429 |  |
2021 | 432,602 |  |  |  |  |  |  |  | 432,602 |  |
2022 | 377,964 |  |  |  |  |  |  |  | 377,964 |  |
Thereafter | 1,378,404 |  |  |  |  |  |  |  | 1,378,404 |  |
Total future minimum base rents | $ 3,831,442 |  |  |  |  |  |  |  | 3,831,442 |  |
Operating Costs and Expenses [Abstract] |  |  |  |  |  |  |  |  |  |  |
Utilities, insurance and real estate taxes |  |  |  |  |  |  |  |  | 126,461 | 124,940 | 117,470
Maintenance, cleaning and general building |  |  |  |  |  |  |  |  | 90,764 | 86,221 | 79,091
Property management and administrative expenses |  |  |  |  |  |  |  |  | 13,117 | 12,588 | 12,446
Other miscellaneous operating expenses |  |  |  |  |  |  |  |  | 6,546 | 7,336 | 6,934
Rental property and other expenses, net |  |  |  |  |  |  |  |  | $ 236,888 | $ 231,085 | $ 215,941

X
- Definition The amount of deferred rental revenue. + References No definition available. + Details
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- Definition The amount of lease termination revenue. + References No definition available. + Details
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- Definition The aggregate costs related to maintenance, cleaning, and general building costs of owned properties during the reporting period. + References No definition available. + Details
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- Definition The aggregate costs related to real estate taxes, insurance, and utilities of owned properties during the reporting period. + References No definition available. + Details
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- Definition Other operating costs incurred during the reporting period and may include amounts paid to maintain the property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Future minimum rental payments in aggregate as of the balance sheet date under operating leases. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 + Details
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- Definition Future rental payments receivable within one year of the balance sheet date under an operating lease. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 + Details
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- Definition Future rental payments receivable within the second year from the balance sheet date under an operating lease. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 + Details
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- Definition Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164653&loc=d3e41551-112718 + Details
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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 Other real estate revenue not otherwise specified in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The aggregate costs related to management of owned properties during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The aggregate revenue from real estate operations during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition In accordance with the provisions of their lease agreement, this element represents allowable charges due a landlord from its tenant. In retail store and office building leases, for example, tenant reimbursements may cover items such as taxes, utilities, and common area expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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