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CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Interest income: |  |  |  |
Loans, including fees | $ 233,857 | $ 224,482 | $ 694,017 | $ 687,183
Securities: |  |  |  |
Taxable | 8,986 | 8,276 | 25,073 | 28,133
Tax-exempt | 15,873 | 15,001 | 47,917 | 43,421
Federal funds sold and other | 2,152 | 1,429 | 5,014 | 5,258
Total interest income | 260,868 | 249,188 | 772,021 | 763,995
Interest expense: |  |  |  |
Deposits | 12,139 | 28,401 | 43,468 | 112,826
Securities sold under agreements to repurchase | 57 | 77 | 185 | 286
Federal Home Loan Bank advances and other borrowings | 11,129 | 14,116 | 34,730 | 50,080
Total interest expense | 23,325 | 42,594 | 78,383 | 163,192
Net interest income | 237,543 | 206,594 | 693,638 | 600,803
Provision for credit losses | 3,382 | 16,758 | 13,451 | 194,635
Net interest income after provision for credit losses | 234,161 | 189,836 | 680,187 | 406,168
Noninterest income: |  |  |  |
Total noninterest income | 104,095 | 91,065 | 295,011 | 234,396
Noninterest expense: |  |  |  |
Salaries and employee benefits | 112,406 | 90,103 | 325,958 | 244,470
Equipment and occupancy | 23,712 | 21,622 | 70,253 | 64,626
Other real estate (income) expense, net | (79) | 1,795 | (749) | 7,098
Marketing and other business development | 3,325 | 2,321 | 8,326 | 7,714
Postage and supplies | 2,083 | 1,761 | 6,004 | 5,821
Amortization of intangibles | 2,088 | 2,417 | 6,461 | 7,416
Other noninterest expense | 25,316 | 23,833 | 73,434 | 66,005
Total noninterest expense | 168,851 | 143,852 | 489,687 | 403,150
Income before income taxes | 169,405 | 137,049 | 485,511 | 237,414
Income tax expense | 32,828 | 26,404 | 91,716 | 35,969
Net income | 136,577 | 110,645 | 393,795 | 201,445
Preferred stock dividends | (3,798) | (3,798) | (11,394) | (3,798)
Net income available to common shareholders | $ 132,779 | $ 106,847 | $ 382,401 | $ 197,647
Per share information: |  |  |  |
Basic net income per common share | $ 1.76 | $ 1.42 | $ 5.07 | $ 2.62
Diluted net income per common share | $ 1.75 | $ 1.42 | $ 5.05 | $ 2.62
Weighted average common shares outstanding: |  |  |  |
Basic | 75,494,286 | 75,240,664 | 75,449,900 | 75,417,663
Diluted | 75,836,142 | 75,360,033 | 75,760,618 | 75,544,677
Service charges on deposit accounts |  |  |  |
Noninterest income: |  |  |  |
Total noninterest income | $ 11,435 | $ 9,854 | $ 28,648 | $ 25,796
Investment services |  |  |  |
Noninterest income: |  |  |  |
Total noninterest income | 9,648 | 6,734 | 26,836 | 21,944
Insurance sales commissions |  |  |  |
Noninterest income: |  |  |  |
Total noninterest income | 2,557 | 2,284 | 8,188 | 7,755
Gain on mortgage loans sold, net |  |  |  |
Noninterest income: |  |  |  |
Total noninterest income | 7,814 | 19,453 | 28,180 | 47,655
Investment gains on sales, net |  |  |  |
Noninterest income: |  |  |  |
Total noninterest income | 0 | 651 | 366 | 986
Trust fees |  |  |  |
Noninterest income: |  |  |  |
Total noninterest income | 5,049 | 3,986 | 14,798 | 12,114
Income from equity method investment |  |  |  |
Noninterest income: |  |  |  |
Total noninterest income | 30,409 | 26,445 | 91,430 | 59,245
Other noninterest income |  |  |  |
Noninterest income: |  |  |  |
Total noninterest income | $ 37,183 | $ 21,658 | $ 96,565 | $ 58,901

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