Deferred Leasing Costs and Lease Intangibles, net - Amortization Expense For Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization expense (income) of above and below market leases	$ (12,836)	$ (17,593)	$ (18,062)
Deferred leasing costs and lease intangibles, net	(285,448)	(279,896)
Lease intangible liabilities, net	31,493	45,612
Below-market leases
Finite-Lived Intangible Assets [Line Items]
Amortization expense (income) of above and below market leases	(14,076)	(19,143)	(25,015)
2020	10,220
2021	7,298
2022	4,719
2023	3,807
2024	1,804
Thereafter	2,769
Lease intangible liabilities, net	30,617	44,693
Above-market ground leases
Finite-Lived Intangible Assets [Line Items]
Amortization expense (income) of above and below market leases	(43)	(43)	(43)
2020	43
2021	43
2022	43
2023	43
2024	43
Thereafter	661
Lease intangible liabilities, net	876	919
Deferred leasing costs and in-place lease intangibles
Finite-Lived Intangible Assets [Line Items]
Amortization expense (income) of above and below market leases	45,177	46,690	72,883
2020	(36,485)
2021	(30,115)
2022	(23,739)
2023	(19,423)
2024	(13,981)
Thereafter	(98,656)
Deferred leasing costs and lease intangibles, net	(222,399)	(213,103)
Below-market ground leases
Finite-Lived Intangible Assets [Line Items]
Amortization expense (income) of above and below market leases	2,503	2,465	2,548
2020	(2,504)
2021	(2,504)
2022	(2,504)
2023	(2,504)
2024	(2,504)
Thereafter	(48,960)
Deferred leasing costs and lease intangibles, net	(61,480)	(63,984)
Above-market leases
Finite-Lived Intangible Assets [Line Items]
Amortization expense (income) of above and below market leases	1,240	1,550	$ 6,953
2020	(594)
2021	(412)
2022	(245)
2023	(217)
2024	(95)
Thereafter	(6)
Deferred leasing costs and lease intangibles, net	$ (1,569)	$ (2,809)

Finite-Lived Intangible Liabilities, Amortization Expense, Next Twelve Months

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Finite-Lived Intangible Liabilities, Amortization Expense, Thereafter

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Finite-Lived Intangible Liabilities, Amortization Expense, Year Five

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Finite-Lived Intangible Liabilities, Amortization Expense, Year Four

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Amount of non-cash amortization of intangible asset (liability) for above and below market leases.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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-Topic 230
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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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