Related Party Transactions - Schedule of Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Incurred fees	$ 39	$ 911	$ 8,892
Receivable	271	1,411
Incurred costs	13,483	15,037	25,244
Payable	2,418	3,272
Cash to be received from an affiliate related to deferred compensation and other payroll costs
Related Party Transaction [Line Items]
Incurred fees	0	0	658
Receivable	0	0
Operating expenses
Related Party Transaction [Line Items]
Incurred costs	0	0	0
Payable	0	1,085
Asset management fees
Related Party Transaction [Line Items]
Incurred costs	0	0	0
Payable	0	695
Disposition fees
Related Party Transaction [Line Items]
Incurred costs	0	0	641
Payable	0	0
Costs advanced by the advisor
Related Party Transaction [Line Items]
Incurred costs	2,275	2,000	3,771
Payable	929	0
Consulting fee - shared services
Related Party Transaction [Line Items]
Incurred costs	2,520	2,500	2,500
Payable	461	0
Acquisition fees
Related Party Transaction [Line Items]
Incurred costs	0	0	942
Payable	0	0
Leasing commissions
Related Party Transaction [Line Items]
Incurred costs	0	0	2,540
Payable	0	0
Earn-out
Related Party Transaction [Line Items]
Incurred costs	0	0	0
Payable	197	262
Other Fees
Related Party Transaction [Line Items]
Incurred fees	0	243	0
Receivable	0	293
Incurred costs	0	0	20
Payable	0	0
Stockholder Servicing Fee
Related Party Transaction [Line Items]
Incurred costs	0	0	692
Payable	92	494
Distributions
Related Party Transaction [Line Items]
Incurred costs	8,688	10,537	14,138
Payable	739	736
Griffin Capital Corporation | Reimbursable Expense Allocation
Related Party Transaction [Line Items]
Incurred fees	20	15	4
Receivable	11	4
Griffin Capital Corporation | Payroll/Expense Allocation
Related Party Transaction [Line Items]
Incurred fees	19	653	481
Receivable	260	1,114
Griffin Capital Essential Asset REIT II | Payroll/Expense Allocation
Related Party Transaction [Line Items]
Incurred fees	0	0	1,217
Receivable	0	0
Griffin Capital Essential Asset REIT II | O&O Costs (including payroll allocated to O&O)
Related Party Transaction [Line Items]
Incurred fees	0	0	157
Receivable	0	0
Griffin Capital Essential Asset REIT II | Other Fees
Related Party Transaction [Line Items]
Incurred fees	0	0	$ 6,375
Receivable	$ 0	$ 0