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CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Interest income |  |  |  |
Loans | $ 22,409 | $ 23,554 | $ 44,875 | $ 46,921
Investment securities | 269 | 384 | 570 | 780
Federal funds sold and interest-bearing deposits with banks | 53 | 53 | 99 | 155
Total interest income | 22,731 | 23,991 | 45,544 | 47,856
Interest expense |  |  |  |
Deposits | 920 | 3,627 | 2,075 | 8,802
Borrowings | 381 | 590 | 766 | 1,184
Total interest expense | 1,301 | 4,217 | 2,841 | 9,986
Net interest income | 21,430 | 19,774 | 42,703 | 37,870
Provision for (reversal of) loan losses | (1,900) | 10,200 | (2,200) | 16,200
Net interest income after provision for loan losses | 23,330 | 9,574 | 44,903 | 21,670
Noninterest income |  |  |  |
Mortgage banking income | 1,983 | 5,776 | 6,616 | 8,444
Service fees on deposit accounts | 173 | 197 | 358 | 459
ATM and debit card income | 521 | 394 | 991 | 793
Income from bank owned life insurance | 331 | 270 | 598 | 540
Net lender and referral fees on PPP loans | 268 | 2,247 | 268 | 2,247
Other income | 346 | 323 | 695 | 642
Total noninterest income | 3,622 | 9,207 | 9,526 | 13,125
Noninterest expenses |  |  |  |
Compensation and benefits | 6,823 | 6,393 | 13,506 | 12,784
Mortgage production costs | 2,264 | 2,368 | 5,131 | 4,175
Occupancy | 1,550 | 1,497 | 3,187 | 3,030
Other real estate owned expenses | 1 |  | 388 |
Outside service and data processing costs | 1,238 | 1,055 | 2,380 | 2,124
Insurance | 262 | 298 | 563 | 619
Professional fees | 498 | 475 | 918 | 875
Marketing | 201 | 86 | 383 | 316
Other | 658 | 472 | 1,201 | 1,093
Total noninterest expenses | 13,495 | 12,644 | 27,657 | 25,016
Income before income tax expense | 13,457 | 6,137 | 26,772 | 9,779
Income tax expense | 3,134 | 1,459 | 6,083 | 2,269
Net income available to common shareholders | $ 10,323 | $ 4,678 | $ 20,689 | $ 7,510
Earnings per common share |  |  |  |
Basic | $ 1.32 | $ 0.61 | $ 2.65 | $ 0.98
Diluted | $ 1.29 | $ 0.60 | $ 2.60 | $ 0.96
Weighted average common shares outstanding |  |  |  |
Basic | 7,847,516 | 7,722,419 | 7,811,217 | 7,700,508
Diluted | 7,987,615 | 7,818,651 | 7,948,294 | 7,822,912

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1448-109256 + Details
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