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Acquired Intangible Assets and Liabilities | 12 Months Ended
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Dec. 31, 2023
Acquired Intangible Assets and Liabilities |
Acquired Intangible Assets and Liabilities | 10. Acquired Intangible Assets and Liabilities The following table summarizes our acquired intangible assets and liabilities: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance as of
​ | ​ | December 31, 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 | ​ | $ | 2,926,808 | ​ | $ | (952,943) | ​ | $ | 1,973,865 | ​ | $ | 3,327,765 | ​ | $ | (888,105) | ​ | $ | 2,439,660
Acquired in-place lease value | ​ | ​ | 1,089,743 | ​ | ​ | (859,167) | ​ | ​ | 230,576 | ​ | ​ | 1,369,526 | ​ | ​ | (1,041,631) | ​ | ​ | 327,895
Other | ​ | ​ | 108,744 | ​ | ​ | (33,483) | ​ | ​ | 75,261 | ​ | ​ | 94,829 | ​ | ​ | (26,788) | ​ | ​ | 68,041
Acquired above-market leases | ​ | ​ | 153,205 | ​ | ​ | (150,344) | ​ | ​ | 2,861 | ​ | ​ | 264,071 | ​ | $ | (253,693) | ​ | ​ | 10,378
Acquired below-market leases | ​ | ​ | (273,951) | ​ | ​ | 226,840 | ​ | ​ | (47,111) | ​ | ​ | (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 $252.0 million, $253.3 million and $262.9 million for the years ended December 31, 2023, 2022 and 2021, respectively. ​ Amortization of acquired below-market leases, net of acquired above-market leases, resulted in an increase in rental and other services revenue of $6.5 million and $2.9 million for the years ended December 31, 2023 and 2022, respectively, and a decrease of $3.6 million for the year ended December 31, 2021. Estimated annual amortization for each of the five succeeding years and thereafter, commencing January 1, 2024 is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Amounts in thousands) | ​ | Customer relationship value | ​ | ​ | Acquired in-place lease value | ​ | ​ | Other (1) | ​ | ​ | Acquired above-market leases | ​ | ​ | Acquired below-market leases
2024 | $ | 176,848 | ​ | $ | 51,381 | ​ | $ | 2,802 | ​ | $ | 1,327 | ​ | $ | (6,712)
2025 |  | 176,622 | ​ |  | 49,839 | ​ |  | 2,802 | ​ |  | 1,070 | ​ |  | (6,560)
2026 |  | 175,981 | ​ |  | 48,012 | ​ |  | 2,802 | ​ |  | 357 | ​ |  | (5,798)
2027 |  | 175,588 | ​ |  | 38,482 | ​ |  | 2,802 | ​ |  | 48 | ​ |  | (5,182)
2028 |  | 153,143 | ​ |  | 18,563 | ​ |  | 2,817 | ​ |  | 46 | ​ |  | (4,979)
Thereafter |  | 1,115,683 | ​ |  | 24,299 | ​ |  | 7,916 | ​ |  | 13 | ​ |  | (17,880)
Total | $ | 1,973,865 | ​ | $ | 230,576 | ​ | $ | 21,941 | ​ | $ | 2,861 | ​ | $ | (47,111)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Remaining Contractual Life (in years) | ​ | 14.3 | ​ | ​ | 4.5 | ​ | ​ | ​ | ​ | ​ | 2.1 | ​ | ​ | 6.9
(1) | Excludes power grid rights in the amount of approximately $53.3 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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