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Premises and Equipment | 12 Months Ended
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Dec. 31, 2021
Premises and Equipment |
Premises and Equipment | 6. Premises and Equipment ​ At December 31, 2021 and 2020, premises and equipment were comprised of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
(dollars in thousands) |  | 2021 |  | 2020
Buildings | ​ | $ | 295,286 | ​ | $ | 296,107
Furniture and equipment | ​ | ​ | 95,824 | ​ | ​ | 98,800
Land | ​ | ​ | 113,720 | ​ | ​ | 114,852
Leasehold improvements | ​ | ​ | 66,772 | ​ | ​ | 57,063
Total premises and equipment | ​ | ​ | 571,602 | ​ | ​ | 566,822
Less: Accumulated depreciation and amortization | ​ | ​ | 253,154 | ​ | ​ | 244,421
Net book value | ​ | $ | 318,448 | ​ | $ | 322,401
​ Depreciation and amortization expenses included in occupancy and equipment expenses for 2021, 2020 and 2019 were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
(dollars in thousands) |  | 2021 |  | 2020 |  | 2019
Occupancy | ​ | $ | 9,149 | ​ | $ | 9,231 | ​ | $ | 9,037
Equipment | ​ | ​ | 6,682 | ​ | ​ | 6,721 | ​ | ​ | 5,485
Total | ​ | $ | 15,831 | ​ | $ | 15,952 | ​ | $ | 14,522
​ The Company, as a lessor, leases certain properties that it owns. See “Note 13. Leases” in the notes to the consolidated financial statements for more information.

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