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CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Interest income: |  |  |
Interest and fees on loans | $ 314,779 | $ 308,210 | $ 286,165
Interest and dividends on taxable investments | 62,538 | 65,904 | 63,504
Interest and dividends on nontaxable investments | 11,961 | 11,613 | 13,064
Total interest income | 389,278 | 385,727 | 362,733
Interest expense: |  |  |
Interest on deposits | 16,761 | 20,460 | 10,658
Interest on borrowings | 1,569 | 1,848 | 2,343
Interest on subordinated notes payable | 670 | 346 | 0
Interest on subordinated debt held by unconsolidated subsidiary trusts | 1,875 | 3,898 | 4,677
Total interest expense | 20,875 | 26,552 | 17,678
Net interest income | 368,403 | 359,175 | 345,055
Provision for credit losses | 14,212 | 8,430 | 10,837
Net interest income after provision for credit losses | 354,191 | 350,745 | 334,218
Noninterest revenues: |  |  |
Deposit service fees | 57,370 | 65,602 | 70,384
Mortgage banking | 5,301 | 523 | 1,400
Other banking services | 3,753 | 4,358 | 3,568
Employee benefit services | 101,329 | 97,167 | 92,279
Insurance services | 32,372 | 32,199 | 30,317
Wealth management services | 27,879 | 25,869 | 25,772
Unrealized (loss) gain on equity securities | (6) | 19 | 657
Gain (loss) on debt extinguishment | 421 | 0 | (318)
Gain on sales of investment securities, net | 0 | 4,882 | 0
Total noninterest revenues | 228,419 | 230,619 | 224,059
Expenses: |  |  |
Salaries and employee benefits | 228,384 | 219,916 | 207,363
Occupancy and equipment | 40,732 | 39,850 | 39,948
Data processing and communications | 45,755 | 41,407 | 39,094
Amortization of intangible assets | 14,297 | 15,956 | 18,155
Legal and professional fees | 11,605 | 10,783 | 10,644
Business development and marketing | 9,463 | 11,416 | 9,383
Litigation accrual | 2,950 | 0 | 0
Acquisition expenses | 4,933 | 8,608 | (769)
Other expenses | 18,415 | 24,090 | 21,471
Total noninterest expenses | 376,534 | 372,026 | 345,289
Income before income taxes | 206,076 | 209,338 | 212,988
Income taxes | 41,400 | 40,275 | 44,347
Net income | $ 164,676 | $ 169,063 | $ 168,641
Basic earnings per share (in dollars per share) | $ 3.10 | $ 3.26 | $ 3.28
Diluted earnings per share (in dollars per share) | $ 3.08 | $ 3.23 | $ 3.24

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- Definition The non-interest income earned from account activity fees, monthly service fees, check orders, debit and credit card income, ATM fees, Merchant services income and other revenues from processing wire transfers, bill pay service, cashier's checks and foreign exchange. + References No definition available. + Details
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- Definition The noninterest income derived from mortgage banking activities including servicing fees. Also includes the gain/loss on sale of loans. In addition, includes the adjustment to the carrying value of the rights retained or purchased to service mortgages. These adjustments are made on a lower of cost or market value basis. + References No definition available. + Details
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