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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2024
Accounting Policies [Abstract]  
Activity for Goodwill and Other Intangible Assets The following table presents activity for goodwill and other intangible assets (in thousands):
 GoodwillCore deposit and
other intangible assets		Total
Balance at December 31, 2023$1,846,973 $27,465 $1,874,438 
Acquisitions and purchase of other intangible asset2,287 212 2,499 
Amortization— (6,254)(6,254)
Balance at December 31, 2024$1,849,260 $21,423 $1,870,683 
Gross Carrying Amount and Accumulated Amortization for the Core Deposit and Other Intangible Assets
The following table presents the gross carrying amount and accumulated amortization for the core deposit and other intangible assets (in thousands):
 December 31, 2024December 31, 2023
Gross carrying amount$117,423 $117,211 
Accumulated amortization(96,000)(89,746)
Net book value$21,423 $27,465 
Supplemental Cash Flow Information
Cash Equivalents and Cash Flows — Cash on hand, cash items in process of collection, amounts due from banks, Federal funds sold, short-term discount notes and securities purchased under agreements to resell, with original maturities within ninety days, are included in cash and cash equivalents. The following supplemental cash flow information addresses certain cash payments and noncash transactions for each of the years in the three-year period ended December 31, 2024 as follows (in thousands):
 For the years ended December 31,
 202420232022
Cash Payments: 
Interest$1,342,635 $1,042,542 $236,463 
Income taxes paid30,763 99,890 128,850 
Noncash Transactions:   
Loans charged-off to the allowance for credit losses99,205 76,725 54,176 
Loans foreclosed upon with repossessions transferred to other real estate1,780 2,016 230 
Loans foreclosed upon with repossessions transferred to other repossessed assets197 561 — 
Available-for-sale securities transferred to held-to-maturity portfolio— — 1,059,737 
Proceeds receivable from restructure of bank owned life insurance policies— 141,547 — 
Right-of-use assets recognized in the period in exchange for lease obligations26,428 205,776 42,413 
Basic and Diluted Earnings Per Share Calculations
The following is a summary of the basic and diluted earnings per common share calculation for each of the years in the three-year period ended December 31, 2024 (dollars in thousands except earnings per share):
 December 31, 2024December 31, 2023December 31, 2022
Basic earnings per common share calculation:   
Numerator - Net income available to common shareholders
$459,864 $546,960 $545,550 
Denominator – Weighted average common shares outstanding
76,460,926 76,016,370 75,735,404 
Basic net income per common share$6.01 $7.20 $7.20 
Diluted earnings per common share calculation:   
Numerator - Net income available to common shareholders
$459,864 $546,960 $545,550 
Denominator – Weighted average common shares outstanding
76,460,926 76,016,370 75,735,404 
Dilutive shares contingently issuable670,404 631,173 398,461 
Weighted average diluted common shares outstanding77,131,330 76,647,543 76,133,865 
Diluted net income per common share$5.96 $7.14 $7.17