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Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue Streams of Rental Income and Percentage of Rental Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Amount of rental income | $ 639,620 | $ 612,299 | $ 1,272,451 | $ 1,216,219
Percentage of rental income | 100.00% |  | 100.00% |
Amount of rental income | $ 599,976 |  | $ 1,192,789 |
Leasing Revenue [Member} |  |  |  |
Percentage of rental income | 93.80% |  | 93.80% |
Utility Recoveries [Member] |  |  |  |
Amount of rental income | $ 15,560 |  | $ 30,935 |
Percentage of rental income | 2.40% |  | 2.40% |
Parking Revenue [Member] |  |  |  |
Amount of rental income | $ 6,267 |  | $ 14,064 |
Percentage of rental income | 1.00% |  | 1.10% |
Other Revenue [Member] |  |  |  |
Amount of rental income | $ 17,817 |  | $ 34,663 |
Percentage of rental income | 2.80% |  | 2.70% |

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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://fasb.org/us-gaap/role/ref/legacyRef -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 Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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