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Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Deferred tax assets: |  |
Allowance for credit losses | $ 73,001 | $ 35,163
Operating leases - liability | 24,051 | 11,924
Deferred compensation | 10,364 | 4,088
Identified intangible assets and goodwill | 4,199 | 4,666
Supplemental Executive Retirement Plans | 2,473 | 2,427
Net operating loss carryforwards | 155 | 145
Postretirement benefits | 505 | 811
Tax credit carryforward | 6,986 | 0
Nonaccrual interest | 1,300 | 780
Restricted stock and stock option plans | 339 | 1,153
Unrealized loss on investment securities available-for-sale | 6,831 | 15,629
Acquisition fair value adjustments | 98,047 | 11,531
Depreciation | 3,183 | 0
Loan servicing rights | 2,868 | 0
Other | 335 | 166
Total gross deferred tax assets, before valuation allowance | 234,637 | 88,483
Valuation allowance | (400) | 0
Deferred tax assets, net of valuation allowance | 234,237 | 88,483
Deferred tax liabilities: |  |
Right-of-use asset - operating leases | 22,592 | 11,591
Identified intangible assets and goodwill | 49,654 | 6,475
Deferred loan origination costs, net | 3,357 | 3,926
Depreciation | 0 | 723
Prepaid expense | 1,015 | 377
Accrued Expense | 2,048 | 7,121
Investment in partnership | 906 | 1,646
Loan servicing rights | 5,174 | 0
Other | 4 | 4
Total gross deferred tax liabilities | 84,750 | 31,863
Net deferred tax asset | $ 149,487 | $ 56,620

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- Definition The tax effect as of the balance sheet date of the amount of the estimated future tax deductions attributable to nonaccrual interest and partial write downs on loans which can only be deducted for tax purposes when actual costs are known, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. + References No definition available. + Details
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