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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 | $ 275,189 | $ 291,889 | $ 257,316
Interest and dividends on investments: |  |  |
Taxable interest | 24,063 | 29,773 | 31,264
Interest exempt from federal income taxes | 1,053 | 1,591 | 1,646
Dividends | 686 | 1,608 | 1,859
Interest on bank deposits | 218 | 403 | 172
Total interest income | 301,209 | 325,264 | 292,257
Interest Expense |  |  |
Interest on deposits | 21,972 | 36,725 | 21,713
Interest on short-term borrowings | 704 | 8,298 | 10,741
Interest on subordinated debentures | 8,580 | 9,084 | 6,987
Interest on other long-term debt | 1,419 | 1,016 | 300
Interest Expense, Lessee, Assets under Capital Lease | 263 | 279 | 294
Total interest expense | 32,938 | 55,402 | 40,035
Net Interest Income | 268,271 | 269,862 | 252,222
Provision for credit losses | 56,718 | 14,533 | 12,531
Net Interest Income after Provision for Credit Losses | 211,553 | 255,329 | 239,691
Noninterest Income |  |  |
Net securities gains | 70 | 22 | 8,102
Trust income | 9,101 | 8,321 | 7,901
Service charges on deposit accounts | 16,387 | 18,926 | 18,175
Insurance and retail brokerage commissions | 7,850 | 7,583 | 7,426
Income from bank owned life insurance | 6,552 | 6,002 | 6,686
Gain on sale of mortgage loans | 18,764 | 7,765 | 5,436
Gain on sale of other loans and assets | (4,827) | (4,793) | (5,273)
Card related interchange income | 23,966 | 21,677 | 20,187
Derivative, Gain (Loss) on Derivative, Net | (2,521) | (269) | 787
Swap Fee Income | 1,588 | 3,397 | 1,874
Other income | 7,892 | 7,268 | 6,790
Total noninterest income | 94,476 | 85,485 | 88,637
Noninterest Expense |  |  |
Salaries and employee benefits | 118,961 | 112,237 | 105,115
Net occupancy | 17,647 | 18,923 | 17,219
Furniture and equipment | 15,393 | 15,160 | 14,247
Data processing | 10,543 | 10,692 | 10,470
Advertising and promotion | 4,679 | 4,250 | 3,956
Pennsylvania shares tax | 4,500 | 4,602 | 4,875
Intangible amortization | 3,689 | 3,344 | 3,217
Other professional fees and services | 3,886 | 4,631 | 4,473
FDIC insurance | 2,699 | 1,219 | 2,007
Asset Impairment Charges | 680 | 1,724 | 1,080
Litigation and operational losses | 1,411 | 1,687 | 1,162
Merger and acquisition related | 0 | 3,536 | 1,637
COVID-19 related expenses | 874 | 0 | 0
Voluntary retirement plan expenses | 3,422 | 0 | 0
Branch consolidation expense | 2,672 | 0 | 0
Other operating expenses | 24,770 | 27,960 | 26,098
Total noninterest expense | 215,826 | 209,965 | 195,556
Income before income taxes | 90,203 | 130,849 | 132,772
Income tax provision | 16,756 | 25,516 | 25,274
Net Income | $ 73,447 | $ 105,333 | $ 107,498
Average Shares Outstanding (in shares) | 97,499,586 | 98,317,787 | 99,036,163
Average Shares Outstanding Assuming Dilution (in shares) | 97,758,965 | 98,588,164 | 99,223,513
Per Share Data: |  |  |
Basic Earnings Per Share (in dollars per share) | $ 0.75 | $ 1.07 | $ 1.09
Diluted Earnings Per Share (in dollars per share) | 0.75 | 1.07 | 1.08
Cash Dividends Declared per Common Share (in dollars per share) | $ 0.44 | $ 0.40 | $ 0.35
Securities held to maturity, fair value | $ 369,851 | $ 338,718 |

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- Definition The Pennsylvania shares tax is imposed annually on the book value of shares of banks and trust companies that conduct business in Pennsylvania. The book value is calculated using a six-year rolling average of the book values of paid-in capital, surplus and undivided profits, with deductions taken for U.S. Government obligations, and beginning on January 1, 2008, goodwill from acquisitions after June 30, 2001. The current tax rate is 1.25 percent. + References No definition available. + Details
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