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Premises and Equipment - Components and Depreciation and Amortization Expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Components of premises and equipment |  |  |
Total premises and equipment | $ 553,529 | $ 533,477 |
Less: Accumulated depreciation and amortization | 264,999 | 252,016 |
Net book value | 288,530 | 281,461 |
Depreciation and amortization expenses | 13,789 | 13,585 | $ 15,318
Occupancy |  |  |
Components of premises and equipment |  |  |
Depreciation and amortization expenses | 8,009 | 8,336 | 9,192
Equipment |  |  |
Components of premises and equipment |  |  |
Depreciation and amortization expenses | 5,780 | 5,249 | $ 6,126
Buildings |  |  |
Components of premises and equipment |  |  |
Total premises and equipment | 294,574 | 294,401 |
Furniture and equipment |  |  |
Components of premises and equipment |  |  |
Total premises and equipment | 86,991 | 82,807 |
Land |  |  |
Components of premises and equipment |  |  |
Total premises and equipment | 100,619 | 97,306 |
Leasehold improvements |  |  |
Components of premises and equipment |  |  |
Total premises and equipment | $ 71,345 | $ 58,963 |

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