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Intangible Assets on Real Estate Acquisitions | 12 Months Ended
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Dec. 31, 2018
Intangible Assets on Real Estate Acquisitions |
Intangible Assets on Real Estate Acquisitions | Intangible Assets on Real Estate Acquisitions Intangible assets on real estate acquisitions consisted of the following (in thousands):
|  | December 31, 2018 |  | December 31, 2017
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
In-place lease value |  | $ | 132,276 |  |  | $ | 117,520 |  |  | $ | 14,756 |  |  | $ | 132,276 |  |  | $ | 110,814 |  |  | $ | 21,462 |
Tenant relationship value |  | 60,028 |  |  | 39,703 |  |  | 20,325 |  |  | 60,028 |  |  | 32,198 |  |  | 27,830 |
Below-market cost arrangements |  | 8,880 |  |  | 1,507 |  |  | 7,373 |  |  | 15,102 |  |  | 7,507 |  |  | 7,595 |
Above-market leases |  | 13,841 |  |  | 13,164 |  |  | 677 |  |  | 13,944 |  |  | 12,092 |  |  | 1,852 |
Other |  | 1,333 |  |  | 994 |  |  | 339 |  |  | 1,333 |  |  | 980 |  |  | 353 |
|  | $ | 216,358 |  |  | $ | 172,888 |  |  | $ | 43,470 |  |  | $ | 222,683 |  |  | $ | 163,591 |  |  | $ | 59,092 |
Amortization of the intangible asset categories set forth above totaled $15.6 million in 2018, $19.3 million in 2017 and $20.0 million in 2016. The approximate weighted average amortization periods of the categories set forth above follow: in-place lease value: seven years; tenant relationship value: nine years; below-market cost arrangements: 33 years; above-market leases: six years; and other: 24 years. The approximate weighted average amortization period for all of the categories combined is 12 years. The estimated amortization (to amortization associated with real estate operations, rental revenue and property operating expenses) associated with the intangible asset categories set forth above for the next five years is: $8.3 million for 2019; $5.5 million for 2020; $5.3 million for 2021; $3.8 million for 2022; and $3.4 million for 2023.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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