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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2022
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, 2021$1,819,811 $33,819 $1,853,630 
Acquisitions and purchase of other intangible asset27,162 8,546 35,708 
Amortization— (7,810)(7,810)
Balance at December 31, 2022$1,846,973 $34,555 $1,881,528 
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, 2022December 31, 2021
Gross carrying amount$117,211 $108,665 
Accumulated amortization(82,656)(74,846)
Net book value$34,555 $33,819 
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, 2022 as follows (in thousands):
 For the years ended December 31,
 202220212020
Cash Payments: 
Interest$236,463 $110,119 $215,888 
Income taxes paid128,850 108,304 110,798 
Noncash Transactions:   
Loans charged-off to the allowance for credit losses54,176 54,996 49,333 
Loans foreclosed upon with repossessions transferred to other real estate230 1,098 3,436 
Loans foreclosed upon with repossessions transferred to other repossessed assets— — 25 
Available-for-sale securities transferred to held-to-maturity portfolio1,059,737 — 873,613 
Right-of-use assets recognized in the period in exchange for lease obligations42,413 17,642 15,820 
Basic and Diluted Earnings Per Share Calculations
The following is a summary of the basic and diluted earnings per share calculation for each of the years in the three-year period ended December 31, 2022 (dollars in thousands except earnings per share):
 December 31, 2022December 31, 2021December 31, 2020
Basic earnings per common share calculation:   
Numerator - Net income available to common shareholders
$545,550 $512,131 $304,725 
Denominator – Weighted average common shares outstanding
75,735,404 75,468,339 75,376,489 
Basic net income per common share$7.20 $6.79 $4.04 
Diluted earnings per common share calculation:   
Numerator - Net income available to common shareholders
$545,550 $512,131 $304,725 
Denominator – Weighted average common shares outstanding
75,735,404 75,468,339 75,376,489 
Dilutive shares contingently issuable398,461 458,808 277,896 
Weighted average diluted common shares outstanding76,133,865 75,927,147 75,654,385 
Diluted net income per common share$7.17 $6.75 $4.03