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Intangible Assets and Below Market Lease Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Intangible assets and below market lease liabilities, net [Abstract] |  |  |  |  |
Deferred leasing costs (including lease incentives and above market lease and in-place lease acquisition-related intangible assets) | $ 355,268 |  | $ 355,268 |  | $ 346,937
Deferred leasing costs, accumulated amortization | (136,292) |  | (136,292) |  | (115,172)
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 218,976 |  | 218,976 |  | 231,765
Acquisition-related below market lease liabilities, gross | 63,712 |  | 63,712 |  | 63,830
Acquisition-related below market lease liabilities, accumulated amortization | (23,675) |  | (23,675) |  | (17,927)
Acquisition-related below market lease liabilities, net | 40,037 |  | 40,037 |  | $ 45,903
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Acquired intangible assets (amortized in rental and other revenues) | 122 |  | 122 |  |
Acquired intangible assets (amortized in depreciation and amortization) | 5,008 |  | 5,008 |  |
Assumed below market lease liabilities (amortized in rental and other revenues) | (428) |  | (428) |  |
Deferred Leasing Costs and Acquisition-Related Intangible Assets [Member] |  |  |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 198,911 |  | 198,911 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 10,111 | $ 10,858 | 33,177 | $ 30,747 |
Lease Incentives [Member] |  |  |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 7,480 |  | 7,480 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 273 | 368 | 1,374 | 1,131 |
Acquisition-Related Intangible Assets (in Rental and Other Revenues) [Member] |  |  |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 10,264 |  | 10,264 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 901 | 1,414 | 2,904 | 3,769 |
Acquisition-Related Intangible Assets (in Rental Property and Other Expenses) [Member] |  |  |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 2,321 |  | 2,321 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 140 | 140 | 417 | 416 |
Acquisition-Related Below Market Lease Liabilities [Member] |  |  |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |  |  |
Acquisition-related below market lease liabilities, net | 40,037 |  | 40,037 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of acquisition-related below market lease liabilities | $ (1,734) | $ (1,727) | $ (6,294) | $ (5,133) |

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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. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of accumulated amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life. + References No definition available. + Details
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- Definition Amount before amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life. + References No definition available. + Details
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- Definition Amount after amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life. + References No definition available. + Details
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- Definition This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to existing tenant relationships and excludes the market adjustment component of the value assigned for above or below-market leases acquired. + References No definition available. + Details
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- Definition This element represents the identifiable intangible asset established upon acquisition based on a favorable difference between the terms of an acquired lease and the current market terms for that lease at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.15) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Accumulated amount of 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=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before 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=66006027&loc=d3e16323-109275 + Details
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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=66006027&loc=d3e16323-109275 + Details
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- Definition This element represents a liability associated with the acquisition of an off-market lease when the terms of the lease are unfavorable to the market terms for the lease at the date of acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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