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Acquired Intangible Assets and Liabilities | 9 Months Ended
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Sep. 30, 2023
Acquired Intangible Assets and Liabilities |
Acquired Intangible Assets and Liabilities | 8. Acquired Intangible Assets and Liabilities The following table summarizes our acquired intangible assets and liabilities: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance as of
​ | ​ | September 30, 2023 | ​ | December 31, 2022
(Amounts in thousands) | ​ | ​ | Gross Carrying Amount | ​ | ​ | Accumulated Amortization | ​ | ​ | Net Carrying Amount | ​ | ​ | Gross Carrying Amount | ​ | ​ | Accumulated Amortization | ​ | ​ | Net Carrying Amount
Customer relationship value | ​ | $ | 2,861,384 | ​ | $ | (898,951) | ​ | $ | 1,962,433 | ​ | $ | 3,327,765 | ​ | $ | (888,105) | ​ | $ | 2,439,660
Acquired in-place lease value | ​ | ​ | 1,089,444 | ​ | ​ | (847,985) | ​ | ​ | 241,459 | ​ | ​ | 1,369,526 | ​ | ​ | (1,041,631) | ​ | ​ | 327,895
Other | ​ | ​ | 99,927 | ​ | ​ | (31,037) | ​ | ​ | 68,890 | ​ | ​ | 94,829 | ​ | ​ | (26,788) | ​ | ​ | 68,041
Acquired above-market leases | ​ | ​ | 151,924 | ​ | ​ | (148,697) | ​ | ​ | 3,227 | ​ | ​ | 264,071 | ​ | $ | (253,693) | ​ | ​ | 10,378
Acquired below-market leases | ​ | ​ | (272,832) | ​ | ​ | 224,148 | ​ | ​ | (48,684) | ​ | ​ | (344,256) | ​ | ​ | 255,821 | ​ | ​ | (88,435)
​ Amortization of customer relationship value, acquired in-place lease value and other intangibles (a component of depreciation and amortization expense) was approximately $59.8 million and $65.7 million for the three months ended September 30, 2023 and 2022, respectively, and approximately $194.4 million and $184.6 million for the nine months ended September 30, 2023 and 2022, respectively. ​ Amortization of acquired below-market leases, net of acquired above-market leases, resulted in an increase in rental and other services revenue of $1.6 million and $1.0 million for the three months ended September 30, 2023 and 2022, respectively, and approximately $5.1 million and $1.5 million for the nine months ended September 30, 2023 and 2022, respectively. ​ Estimated annual amortization for each of the five succeeding years and thereafter, commencing October 1, 2023 is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Amounts in thousands) | ​ | Customer relationship value | ​ | ​ | Acquired in-place lease value | ​ | ​ | Other (1) | ​ | ​ | Acquired above-market leases | ​ | ​ | Acquired below-market leases
2023 | $ | 43,576 | ​ | $ | 12,995 | ​ | $ | 1,122 | ​ | $ | 366 | ​ | $ | (1,715)
2024 |  | 173,725 | ​ |  | 50,760 | ​ |  | 4,487 | ​ |  | 1,327 | ​ |  | (6,656)
2025 |  | 173,183 | ​ |  | 49,246 | ​ |  | 4,447 | ​ |  | 1,070 | ​ |  | (6,503)
2026 |  | 172,550 | ​ |  | 47,447 | ​ |  | 4,249 | ​ |  | 357 | ​ |  | (5,773)
2027 |  | 172,158 | ​ |  | 38,180 | ​ |  | 4,235 | ​ |  | 48 | ​ |  | (5,180)
Thereafter |  | 1,227,241 | ​ |  | 42,831 | ​ |  | 3,832 | ​ |  | 59 | ​ |  | (22,857)
Total | $ | 1,962,433 | ​ | $ | 241,459 | ​ | $ | 22,372 | ​ | $ | 3,227 | ​ | $ | (48,684)
(1) | Excludes power grid rights in the amount of approximately $46.5 million that are currently not being amortized. Amortization of these assets will begin once the data centers associated with the power grid rights are placed into service.

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