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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets Goodwill and other intangible assets consisted of the following (amounts in thousands):
| At December 31, 2022 |  | At December 31, 2021
| Gross Book Value |  | Accumulated Amortization |  | Net Book Value |  | Gross Book Value |  | Accumulated Amortization |  | Net Book Value
Goodwill | $ | 165,843 |  |  | $ | — |  |  | $ | 165,843 |  |  | $ | 165,843 |  |  | $ | — |  |  | $ | 165,843 |
Shurgard® Trade Name | 18,824 |  |  | — |  |  | 18,824 |  |  | 18,824 |  |  | — |  |  | 18,824 |
Finite-lived intangible assets, subject to amortization | 201,668 |  |  | (153,818) |  |  | 47,850 |  |  | 198,180 |  |  | (79,953) |  |  | 118,227 |
Total goodwill and other intangible assets | $ | 386,335 |  |  | $ | (153,818) |  |  | $ | 232,517 |  |  | $ | 382,847 |  |  | $ | (79,953) |  |  | $ | 302,894 |
Finite-lived intangible assets consist primarily of acquired customers in place. Amortization expense related to intangible assets subject to amortization was $95.2 million, $76.6 million and $16.1 million in 2022, 2021, and 2020, respectively. During 2022, 2021, and 2020, intangibles increased $24.8 million, $174.9 million, and $14.9 million, respectively, in connection with the acquisition of real estate facilities (Note 3). The remaining amortization expense will be recognized over a weighted average life of approximately 1.3 years. The estimated future amortization expense for our finite-lived intangible assets at December 31, 2022 is as follows (amounts in thousands):
Year |  | Amount
2023 |  | $ | 36,852 |
2024 |  | 5,746 |
Thereafter |  | 5,252 |
Total |  | $ | 47,850 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI https://asc.fasb.org/topic&trid=2144416 + Details
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