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Income Taxes - Differences Between Tax Basis of Assets and Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Deferred tax assets: |  |
Allowance for credit losses | $ 86,628 | $ 81,251
Deferred compensation | 6,448 | 7,619
Stock compensation | 5,344 | 6,803
Non-accrual interest income | 1,786 | 1,463
Real estate owned | 70 | 79
Unrealized loss on investment securities, available-for-sale | 62,211 | 81,493
Loan discounts | 3,689 | 5,119
Investments | 23,580 | 25,789
Other | 19,084 | 14,691
Gross deferred tax assets | 208,840 | 224,307
Deferred tax liabilities: |  |
Accelerated depreciation on premises and equipment | 0 | 1,477
Tax basis on acquisitions | 6,691 | 4,061
Core deposit intangibles | 9,610 | 11,021
FHLB dividends | 2,835 | 2,351
Other | 13,075 | 8,233
Gross deferred tax liabilities | 32,211 | 27,143
Net deferred tax assets | $ 176,629 | $ 197,164

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