Deferred Leasing Costs and Lease Intangibles, net - Future Amortization Expense For Finitle-lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization of above-market leases	$ 12,534	$ 2,026	$ 2,542
Deferred leasing costs and lease intangibles, net	318,031	102,023
Intangible Liability, Amortization Expense, Maturity Schedule [Line Items]
Amortization of below market leases	(34,607)	(7,661)	(8,570)
Above-market leases
Finite-Lived Intangible Assets [Line Items]
2016	11,242
2017	3,700
2018	3,030
2019	2,515
2020	386
Thereafter	398
Deferred leasing costs and lease intangibles, net	21,271	5,148
Above-market leases \| Rental Revenue
Finite-Lived Intangible Assets [Line Items]
Amortization of above-market leases	12,534	2,026	2,542
Deferred lease cost and in-place lease intangibles
Finite-Lived Intangible Assets [Line Items]
2016	76,208
2017	49,994
2018	30,275
2019	23,355
2020	13,099
Thereafter	47,008
Deferred leasing costs and lease intangibles, net	239,939	90,431
Deferred lease cost and in-place lease intangibles \| Depreciation And Amortization Expense
Finite-Lived Intangible Assets [Line Items]
Amortization of above-market leases	91,965	20,879	24,374
Below-market ground leases
Finite-Lived Intangible Assets [Line Items]
2016	2,182
2017	2,182
2018	2,182
2019	2,182
2020	2,182
Thereafter	45,911
Deferred leasing costs and lease intangibles, net	56,821	6,444
Below-market ground leases \| Office operating expenses
Finite-Lived Intangible Assets [Line Items]
Amortization of above-market leases	1,688	248	247
Below Market Lease \| Rental Revenue
Intangible Liability, Amortization Expense, Maturity Schedule [Line Items]
Amortization of below market leases	(34,607)	(7,661)	(8,570)
Above Market Ground Lease \| Office operating expenses
Intangible Liability, Amortization Expense, Maturity Schedule [Line Items]
Amortization of below market leases	$ (46)	$ 0	$ 0

Amortization of Above Market Leases

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- Definition

[Line Items] for Intangible Liability, Amortization Expense, Maturity Schedule [Table]

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- Definition

Amount of amortization of acquired leases acquired as part of a real property acquisition at below market lease rate with a finite life.

+ References

No definition available.

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after 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.

+ References

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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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 fourth 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 third 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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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