XML 112 R101.htm IDEA: XBRL DOCUMENT v3.25.1
Operating Segments - Summary of Operating Results by Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Segment Reporting Information [Line Items]    
Interest income $ 585,117 $ 585,500
Interest expense 168,897 195,449
Net interest income (expense) 416,220 390,051
Credit loss expense 13,070 13,650
Net interest income after credit loss expense 403,150 376,401
Trust and investment management fees 42,931 39,085
Service charges on deposit accounts 28,621 24,795
Insurance commissions and fees 21,019 18,296
Interchange and card transaction fees 5,402 4,474
Other charges, commissions, and fees 13,586 12,060
Net gain (loss) on securities transactions (14) 0
Other 12,466 12,667
Total non-interest income 124,011 111,377
Salaries and wages 160,857 148,000
Employee benefits 42,157 35,970
Net occupancy 33,277 31,778
Technology, furniture, and equipment 40,118 34,995
Deposit insurance 7,184 14,724
Other 64,473 60,750
Total non-interest expense 348,066 326,217
Income (loss) before income taxes 179,095 161,561
Income tax expense (benefit) 28,173 25,871
Net income (loss) 150,922 135,690
Preferred stock dividends 1,669 1,669
Net income (loss) available to common shareholders 149,253 134,021
Revenues from (expenses to) external customers 540,231 501,428
Average assets (in millions) 50,925,000 49,324,000
Bank    
Segment Reporting Information [Line Items]    
Interest income 583,241 583,729
Interest expense 165,700 191,924
Net interest income (expense) 417,541 391,805
Credit loss expense 13,070 13,650
Net interest income after credit loss expense 404,471 378,155
Trust and investment management fees 0 0
Service charges on deposit accounts 28,618 24,792
Insurance commissions and fees 21,019 18,296
Interchange and card transaction fees 5,402 4,474
Other charges, commissions, and fees 7,406 7,125
Net gain (loss) on securities transactions (14) 0
Other 11,385 11,693
Total non-interest income 73,816 66,380
Salaries and wages 141,092 130,032
Employee benefits 37,338 31,874
Net occupancy 29,736 28,136
Technology, furniture, and equipment 38,557 33,515
Deposit insurance 7,171 14,713
Other 50,828 48,560
Total non-interest expense 304,722 286,830
Income (loss) before income taxes 173,565 157,705
Income tax expense (benefit) 27,526 25,635
Net income (loss) 146,039 132,070
Preferred stock dividends 0 0
Net income (loss) available to common shareholders 146,039 132,070
Revenues from (expenses to) external customers 491,357 458,185
Average assets (in millions) 50,846,000 49,251,000
Frost Wealth Advisors [Member]    
Segment Reporting Information [Line Items]    
Interest income 1,876 1,771
Interest expense 89 102
Net interest income (expense) 1,787 1,669
Credit loss expense 0 0
Net interest income after credit loss expense 1,787 1,669
Trust and investment management fees 43,544 39,581
Service charges on deposit accounts 3 3
Insurance commissions and fees 0 0
Interchange and card transaction fees 0 0
Other charges, commissions, and fees 6,180 4,935
Net gain (loss) on securities transactions 0 0
Other 1,023 907
Total non-interest income 50,750 45,426
Salaries and wages 19,369 17,562
Employee benefits 4,794 4,070
Net occupancy 3,541 3,642
Technology, furniture, and equipment 1,508 1,432
Deposit insurance 13 11
Other 12,640 11,256
Total non-interest expense 41,865 37,973
Income (loss) before income taxes 10,672 9,122
Income tax expense (benefit) 2,241 1,916
Net income (loss) 8,431 7,206
Preferred stock dividends 0 0
Net income (loss) available to common shareholders 8,431 7,206
Revenues from (expenses to) external customers 52,537 47,095
Average assets (in millions) 70,000 64,000
Non-Banks [Member]    
Segment Reporting Information [Line Items]    
Interest income 0 0
Interest expense 3,108 3,423
Net interest income (expense) (3,108) (3,423)
Credit loss expense 0 0
Net interest income after credit loss expense (3,108) (3,423)
Trust and investment management fees (613) (496)
Service charges on deposit accounts 0 0
Insurance commissions and fees 0 0
Interchange and card transaction fees 0 0
Other charges, commissions, and fees 0 0
Net gain (loss) on securities transactions 0 0
Other 58 67
Total non-interest income (555) (429)
Salaries and wages 396 406
Employee benefits 25 26
Net occupancy 0 0
Technology, furniture, and equipment 53 48
Deposit insurance 0 0
Other 1,005 934
Total non-interest expense 1,479 1,414
Income (loss) before income taxes (5,142) (5,266)
Income tax expense (benefit) (1,594) (1,680)
Net income (loss) (3,548) (3,586)
Preferred stock dividends 1,669 1,669
Net income (loss) available to common shareholders (5,217) (5,255)
Revenues from (expenses to) external customers (3,663) (3,852)
Average assets (in millions) $ 9,000 $ 9,000