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Lease Intangibles - Schedule of Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Amortizable Intangible Assets |  |
Amortizable Intangible Assets, Gross Carrying Amount | $ 180,514 | $ 173,069
Amortizable Intangible Assets, Accumulated Amortization | (64,143) | (58,485)
Amortizable Intangible Assets, Net Carrying Amount | 116,371 | 114,584
Amortizable Intangible Liabilities |  |
Amortizable Intangible Liabilities, Gross Carrying Amount | (138,476) | (137,032)
Amortizable Intangible Liabilities, Accumulated Amortization | 34,903 | 32,004
Amortizable Intangible Liabilities, Net Carrying Amount | (103,573) | (105,028)
Below market rents, acquired | $ 1,400 |
Below market rents acquired, weighted average useful life | 13 years 3 months 18 days |
In-place lease and tenant relationships |  |
Amortizable Intangible Assets |  |
Amortizable Intangible Assets, Gross Carrying Amount | $ 163,219 | 156,420
Amortizable Intangible Assets, Accumulated Amortization | (53,027) | (47,827)
Amortizable Intangible Assets, Net Carrying Amount | 110,192 | 108,593
Intangible assets acquired | $ 6,800 |
Acquired intangible assets, weighted average useful life | 3 years 1 month 6 days |
Above-market rent |  |
Amortizable Intangible Assets |  |
Amortizable Intangible Assets, Gross Carrying Amount | $ 17,295 | 16,649
Amortizable Intangible Assets, Accumulated Amortization | (11,116) | (10,658)
Amortizable Intangible Assets, Net Carrying Amount | 6,179 | $ 5,991
Intangible assets acquired | $ 600 |
Acquired intangible assets, weighted average useful life | 3 years 8 months 12 days |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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