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Intangible Assets and Below Market Lease Liabilities (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Intangible assets and below market lease liabilities, net [Abstract] |  |  |
Deferred financing and leasing costs, accumulated amortization | $ (92,220) | $ (75,008) |
Deferred financing and leasing costs, net/Total scheduled future amortization of intangible assets | 222,211 | 163,964 |
Acquired intangible assets (amortized in rental and other revenue) | 17,201 |  |
Acquired intangible assets (amortized in depreciation and amortization) | 58,422 |  |
Assumed below market lease liabilities (amortized in rental and other revenue) | (19,124) |  |
Deferred Financing Costs [Member] |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |
Deferred financing and leasing costs, gross | 17,363 | 21,759 |
Deferred financing and leasing costs, accumulated amortization | (5,204) | (7,862) |
Deferred financing and leasing costs, net/Total scheduled future amortization of intangible assets | 12,159 | 13,897 |
Amortization of intangible assets and below market lease liabilities |  |  |
Amortization of intangible assets | 3,802 | 3,685 | 3,312
Deferred Leasing Costs [Member] |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |
Deferred financing and leasing costs, gross | 297,068 | 217,213 |
Deferred financing and leasing costs, accumulated amortization | (87,016) | (67,146) |
Deferred financing and leasing costs, net/Total scheduled future amortization of intangible assets | 210,052 | 150,067 |
Deferred Leasing Costs and Acquisition-Related Intangible Assets [Member] |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |
Deferred financing and leasing costs, net/Total scheduled future amortization of intangible assets | 181,304 |  |
Amortization of intangible assets and below market lease liabilities |  |  |
Amortization of intangible assets | 37,094 | 26,509 | 19,562
Lease Incentives [Member] |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |
Deferred financing and leasing costs, net/Total scheduled future amortization of intangible assets | 6,668 |  |
Amortization of intangible assets and below market lease liabilities |  |  |
Amortization of intangible assets | 1,409 | 1,389 | 1,302
Acquisition-Related Intangible Assets (in Rental and Other Revenue) [Member] |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |
Deferred financing and leasing costs, net/Total scheduled future amortization of intangible assets | 18,229 |  |
Amortization of intangible assets and below market lease liabilities |  |  |
Amortization of intangible assets | 3,676 | 1,357 | 915
Acquisition-Related Intangible Assets (in Rental Property and Other Expenses) [Member] |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |
Deferred financing and leasing costs, net/Total scheduled future amortization of intangible assets | 3,851 |  |
Amortization of intangible assets and below market lease liabilities |  |  |
Amortization of intangible assets | 556 | 186 | 0
Acquisition-Related Below Market Lease Liabilities [Member] |  |  |
Intangible assets and below market lease liabilities, net [Abstract] |  |  |
Acquisition-related below market lease liabilities, gross | 55,323 | 37,019 |
Acquisition-related below market lease liabilities, accumulated amortization | (8,478) | (3,383) |
Acquisition-related below market lease liabilities, net | 46,845 | 33,636 |
Amortization of intangible assets and below market lease liabilities |  |  |
Amortization of acquisition-related below market lease liabilities | $ (5,316) | $ (2,627) | $ (840)

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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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: 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 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=26713463&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=26713463&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=26713463&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=26713463&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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