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Fair Value Measurement (Tables)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2019
Fair Value Disclosures [Abstract]    
Schedule Of Carrying Value And Fair Value Of Financial Instruments Not Recorded At Fair Value  
The following table presents estimated fair values of the Company's financial instruments as of December 31, 2023 and 2022, whether or not recognized or recorded at fair value on a recurring basis in the Consolidated Balance Sheets:  
December 31, 2023December 31, 2022
(in thousands)LevelCarrying ValueFair ValueCarrying ValueFair Value
Financial assets:    
Cash and cash equivalents1$2,162,534 $2,162,534 $1,294,643 $1,294,643 
Equity and other investment securities1,276,995 76,995 72,959 72,959 
Investment securities available for sale1,28,829,870 8,829,870 3,196,166 3,196,166 
Investment securities held to maturity32,300 3,025 2,476 3,197 
Loans held for sale230,715 30,715 71,647 71,647 
Loans and leases, net
2,337,001,080 35,810,989 25,854,846 24,399,370 
Restricted equity securities1179,274 179,274 47,144 47,144 
Residential mortgage servicing rights3109,243 109,243 185,017 185,017 
Bank owned life insurance1680,948 680,948 331,759 331,759 
Derivatives2,338,085 38,085 15,444 15,444 
Financial liabilities:    
Demand, money market, and savings deposits1$35,379,451 $35,379,451 $24,355,381 $24,355,381 
Time deposits26,227,569 6,201,519 2,710,231 2,667,535 
Securities sold under agreements to repurchase2252,119 252,119 308,769 308,769 
Borrowings23,950,000 3,950,037 906,175 905,591 
Junior subordinated debentures, at fair value3316,440 316,440 323,639 323,639 
Junior and other subordinated debentures, at amortized cost3107,895 97,695 87,813 80,922 
Derivatives2,3261,091 261,091 271,205 271,205 
Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis
The following tables present information about the Company's assets and liabilities measured at fair value on a recurring basis as of December 31, 2023 and 2022:
(in thousands)December 31, 2023
DescriptionTotalLevel 1Level 2Level 3
Financial assets:
Equity and other investment securities    
Investments in mutual funds and other securities$63,298 $44,839 $18,459 $— 
Equity securities held in rabbi trusts13,697 13,697 — — 
Investment securities available for sale
U.S. Treasury and agencies1,478,392 373,664 1,104,728 — 
Obligations of states and political subdivisions1,072,105 — 1,072,105 — 
Mortgage-backed securities and collateralized mortgage obligations
6,279,373 — 6,279,373 — 
Loans held for sale, at fair value30,715 — 30,715 — 
Loans and leases, at fair value275,140 — 275,140 — 
Residential mortgage servicing rights, at fair value109,243 — — 109,243 
Derivatives
Interest rate futures3,745 — 3,745 — 
Interest rate forward sales commitments9 — 9 — 
Interest rate swaps33,874 — 33,874 — 
Foreign currency derivatives457 — 457 — 
Total assets measured at fair value$9,360,048 $432,200 $8,818,605 $109,243 
Financial liabilities:
Junior subordinated debentures, at fair value$316,440 $— $— $316,440 
Derivatives    
Interest rate lock commitments137 — — 137 
Interest rate forward sales commitments535 — 535 — 
Interest rate swaps260,064 — 260,064 — 
Foreign currency derivatives355 — 355 — 
Total liabilities measured at fair value$577,531 $— $260,954 $316,577 
(in thousands)December 31, 2022
DescriptionTotalLevel 1Level 2Level 3
Financial assets:
Equity and other investment securities    
Investments in mutual funds and other securities$61,593 $44,256 $17,337 $— 
Equity securities held in rabbi trusts11,366 11,366 — — 
Investment securities available for sale     
U.S. Treasury and agencies936,174 225,853 710,321 — 
Obligations of states and political subdivisions269,800 — 269,800 — 
Mortgage-backed securities and collateralized mortgage obligations
1,990,192 — 1,990,192 — 
Loans held for sale, at fair value71,647 — 71,647 — 
Loans and leases, at fair value285,581 — 285,581 — 
Residential mortgage servicing rights, at fair value185,017 — — 185,017 
Derivatives    
Interest rate lock commitments50 — — 50 
Interest rate forward sales commitments512 — 512 — 
Interest rate swaps14,657 — 14,657 — 
Foreign currency derivatives225 — 225 — 
Total assets measured at fair value$3,826,814 $281,475 $3,360,272 $185,067 
Financial liabilities:
Junior subordinated debentures, at fair value$323,639 $— $— $323,639 
Derivatives
Interest rate lock commitments18 — — 18 
Interest rate futures392 — 392 — 
Interest rate forward sales commitments601 — 601 — 
Interest rate swaps270,009 — 270,009 — 
Foreign currency derivatives185 — 185 — 
Total liabilities measured at fair value$594,844 $— $271,187 $323,657 
  
Schedule of a Description of the Valuation Technique, Unobservable Input, and Qualitative Information for the Company's Assets and Liabilities Classified as Level 3 The following table provides a description of the valuation technique, significant unobservable inputs, and qualitative information about the unobservable inputs for the Company's assets and liabilities classified as Level 3 and measured at fair value on a recurring basis as of December 31, 2023:  
Schedule Of Reconciliation Of Assets And Liabilities Measured At Fair Value Using Significant Unobservable Inputs (Level 3) On A Recurring Basis
The following table provides a reconciliation of assets and liabilities measured at fair value using significant unobservable inputs (Level 3) on a recurring basis during the years ended December 31, 2023 and 2022. 
20232022
(in thousands)Residential mortgage servicing rightsInterest rate lock commitments, netJunior subordinated debentures, at fair valueResidential mortgage servicing rightsInterest rate lock commitments, netJunior subordinated debentures, at fair value
Beginning balance$185,017 $32 $(323,639)$123,615 $4,641 $(293,081)
Change included in earnings(23,816)(234)(29,045)37,265 (7,342)(15,715)
Change in fair values included in comprehensive income/loss— — 7,866 — — (28,842)
Purchases and issuances5,347 (1,029)— 24,137 10,103 — 
Sales and settlements(57,305)1,094 28,378 — (7,370)13,999 
Ending balance$109,243 $(137)$(316,440)$185,017 $32 $(323,639)
Change in unrealized gains or losses for the period included in earnings for assets and liabilities held at end of period$(6,122)$(137)$(29,045)$57,537 $32 $(15,715)
Change in unrealized gains or losses for the period included in other comprehensive income for assets and liabilities held at end of period$— $— $7,866 $— $— $(28,842)

Changes in residential mortgage servicing rights carried at fair value are recorded in residential mortgage banking revenue within non-interest income. Gains (losses) on interest rate lock commitments carried at fair value are recorded in residential mortgage banking revenue within non-interest income.
The contractual interest expense on the junior subordinated debentures is recorded on an accrual basis as interest on junior subordinated debentures within interest expense. Settlements related to the junior subordinated debentures represent the payment of accrued interest that is embedded in the fair value of these liabilities. 		 
Fair Value Assets And Liabilities Measured On Nonrecurring Basis
2023
(in thousands)TotalLevel 1Level 2Level 3
Loans and leases$5,036 $— $— $5,036 
Total assets measured at fair value on a nonrecurring basis$5,036 $— $— $5,036 

2022
(in thousands)TotalLevel 1Level 2Level 3
Loans and leases$3,216 $— $— $3,216 
Total assets measured at fair value on a nonrecurring basis$3,216 $— $— $3,216 
  
Losses Resulting From Nonrecurring Fair Value Adjustments  
The following table presents the losses resulting from nonrecurring fair value adjustments for the years ended December 31, 2023, 2022, and 2021: 
(in thousands)202320222021
Loans and leases$104,320 $39,422 $53,182 
Total losses from nonrecurring measurements$104,320 $39,422 $53,182 
Fair Value Option
The following table presents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans held for sale and loans held for investment accounted for under the fair value option as of December 31, 2023 and 2022:
December 31, 2023December 31, 2022
(in thousands)Fair ValueAggregate Unpaid Principal BalanceFair Value Less Aggregate Unpaid Principal BalanceFair ValueAggregate Unpaid Principal BalanceFair Value Less Aggregate Unpaid Principal Balance
Loans held for sale$30,715 $29,629 $1,086 $71,647 $70,219 $1,428 
Loans$275,140 $320,397 $(45,257)$285,581 $333,469 $(47,888)