Real Estate and Lease Intangibles - Summary of Aggregate Amortization Expense for Above and Below Market Ground And Retail Lease Intangibles (Details) $ in Thousands	Jun. 30, 2017 USD ($)
Finite-lived intangible assets, amortization expense, remainder of fiscal year 2017	$ 2,064
Finite-lived intangible assets, amortization expense, year 2018	4,250
Finite-lived intangible assets, amortization expense, year 2019	4,250
Finite-lived intangible assets, amortization expense, year 2020	4,250
Finite-lived intangible assets, amortization expense, year 2021	4,250
Finite-lived intangible assets, amortization expense, year 2022	4,294
Ground Lease [Member]
Finite-lived intangible assets, amortization expense, remainder of fiscal year 2017	2,161
Finite-lived intangible assets, amortization expense, year 2018	4,321
Finite-lived intangible assets, amortization expense, year 2019	4,321
Finite-lived intangible assets, amortization expense, year 2020	4,321
Finite-lived intangible assets, amortization expense, year 2021	4,321
Finite-lived intangible assets, amortization expense, year 2022	4,321
Retail Lease [Member]
Finite lived intangible assets amortization income, reminder of fiscal year 2017	(97)
Finite-lived intangible assets; amortization income, year 2018	(71)
Finite-lived intangible assets; amortization income, year 2019	(71)
Finite-lived intangible assets; amortization income, year 2020	(71)
Finite-lived intangible assets; amortization income, year 2021	(71)
Finite-lived intangible assets; amortization income, year 2022	$ (27)