Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Future Amortization of Lease Origination Costs, Financing Costs and in Place Leases (Details)

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Summary of Significant Accounting Policies - Future Amortization of Lease Origination Costs, Financing Costs and in Place Leases (Details)
$ in Thousands
Sep. 30, 2018
USD ($)
Future Amortization Of Deferred Costs And Other Assets [Line Items]  
For the remaining three months ending December 31, 2018 $ 2,772
December 31, 2019 8,565
December 31, 2020 5,940
December 31, 2021 3,753
December 31, 2022 2,941
Thereafter 2,311
Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Six 5,875
Amortization of Intangible Assets 32,157
Leases In Place, net  
Future Amortization Of Deferred Costs And Other Assets [Line Items]  
For the remaining three months ending December 31, 2018 2,074
December 31, 2019 6,498
December 31, 2020 4,615
December 31, 2021 2,855
December 31, 2022 2,181
Thereafter 1,696
Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Six 4,113
Amortization of Intangible Assets 24,032
Tenant Relationships, net  
Future Amortization Of Deferred Costs And Other Assets [Line Items]  
For the remaining three months ending December 31, 2018 564
December 31, 2019 1,567
December 31, 2020 865
December 31, 2021 453
December 31, 2022 359
Thereafter 232
Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Six 288
Amortization of Intangible Assets 4,328
Legal & Marketing Costs, net  
Future Amortization Of Deferred Costs And Other Assets [Line Items]  
For the remaining three months ending December 31, 2018 3
December 31, 2019 12
December 31, 2020 11
December 31, 2021 9
December 31, 2022 6
Thereafter 6
Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Six 13
Amortization of Intangible Assets 60
Ground lease sandwich interest, net  
Future Amortization Of Deferred Costs And Other Assets [Line Items]  
For the remaining three months ending December 31, 2018 68
December 31, 2019 274
December 31, 2020 274
December 31, 2021 274
December 31, 2022 274
Thereafter 274
Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Six 1,119
Amortization of Intangible Assets 2,557
Lease Origination Costs, net  
Future Amortization Of Deferred Costs And Other Assets [Line Items]  
For the remaining three months ending December 31, 2018 63
December 31, 2019 214
December 31, 2020 175
December 31, 2021 162
December 31, 2022 121
Thereafter 103
Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Six 342
Amortization of Intangible Assets $ 1,180