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Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Accounts Payable And Accrued Liabilities [Line Items] |  |  |
Real estate taxes payable | $ 3,633 | $ 3,490 | $ 2,678
Advance Rent | 4,866 | 4,304 | 9,484
Deferred Leasing Commissions | 1,900 | 3,783 | 3,783
Interest Payable, Current | 2,661 | 3,013 | 1,716
Redemptions Payable, Current | 6,671 | 2,181 |
Other liabilities | 2,034 | 3,132 |
Other liabilities |  | 5,313 | 3,866
Total | 21,765 | 19,903 | 21,527
Griffin Capital Essential Asset REIT, Inc. [Member] |  |  |
Accounts Payable And Accrued Liabilities [Line Items] |  |  |
Prepaid rent | 14,543 | 16,138 |
Real estate taxes payable | 25,666 | 21,087 |
Prepaid rent |  | 16,312 | 16,799
Real estate taxes payable |  | 21,317 | 24,585
Interest payable | 9,270 | 7,924 | 7,606
Interest rate swap liability |  | 0 | 3,101
Other liabilities | 25,455 | 18,457 |
Other liabilities |  | 18,580 | 12,914
Total | $ 74,934 | $ 63,606 | $ 65,005

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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(1),(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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