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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2023
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, 2022$1,846,973 $34,555 $1,881,528 
Acquisitions and purchase of other intangible asset— — — 
Amortization— (7,090)(7,090)
Balance at December 31, 2023$1,846,973 $27,465 $1,874,438 
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, 2023December 31, 2022
Gross carrying amount$117,211 $117,211 
Accumulated amortization(89,746)(82,656)
Net book value$27,465 $34,555 
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, 2023 as follows (in thousands):
 For the years ended December 31,
 202320222021
Cash Payments: 
Interest$1,042,542 $236,463 $110,119 
Income taxes paid99,890 128,850 108,304 
Noncash Transactions:   
Loans charged-off to the allowance for credit losses76,725 54,176 54,996 
Loans foreclosed upon with repossessions transferred to other real estate2,016 230 1,098 
Loans foreclosed upon with repossessions transferred to other repossessed assets561 — — 
Available-for-sale securities transferred to held-to-maturity portfolio— 1,059,737 — 
Proceeds receivable from restructure of bank owned life insurance policies141,547 — — 
Right-of-use assets recognized in the period in exchange for lease obligations205,776 42,413 17,642 
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, 2023 (dollars in thousands except earnings per share):
 December 31, 2023December 31, 2022December 31, 2021
Basic earnings per common share calculation:   
Numerator - Net income available to common shareholders
$546,960 $545,550 $512,131 
Denominator – Weighted average common shares outstanding
76,016,370 75,735,404 75,468,339 
Basic net income per common share$7.20 $7.20 $6.79 
Diluted earnings per common share calculation:   
Numerator - Net income available to common shareholders
$546,960 $545,550 $512,131 
Denominator – Weighted average common shares outstanding
76,016,370 75,735,404 75,468,339 
Dilutive shares contingently issuable631,173 398,461 458,808 
Weighted average diluted common shares outstanding76,647,543 76,133,865 75,927,147 
Diluted net income per common share$7.14 $7.17 $6.75