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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Interest income |  |  |
Interest and fees on loans | $ 66,799 | $ 67,472 | $ 61,754
Interest on investment securities |  |  |
Securities of U.S. government agencies | 6,463 | 5,155 | 4,709
Obligations of state and political subdivisions | 2,195 | 2,339 | 2,155
Corporate debt securities and other | 144 | 256 | 685
Interest on federal funds sold and due from banks | 995 | 208 | 135
Total interest income | 76,596 | 75,430 | 69,438
Interest expense |  |  |
Interest on interest-bearing transaction accounts | 108 | 109 | 115
Interest on savings accounts | 66 | 58 | 51
Interest on money market accounts | 555 | 445 | 495
Interest on time accounts | 576 | 743 | 853
Interest on FHLB and overnight borrowings | 0 | 478 | 317
Interest on subordinated debentures | 439 | 436 | 420
Total interest expense | 1,744 | 2,269 | 2,251
Net interest income | 74,852 | 73,161 | 67,187
Provision for (reversal of) loan losses | 500 | (1,850) | 500
Net interest income after provision for loan losses | 74,352 | 75,011 | 66,687
Non-interest income |  |  |
Service charges on deposit accounts | 1,784 | 1,789 | 1,979
Wealth Management and Trust Services | 2,090 | 2,090 | 2,391
Debit card interchange fees | 1,531 | 1,503 | 1,445
Merchant interchange fees | 398 | 449 | 545
Earnings on bank-owned life Insurance | 845 | 844 | 814
Dividends on FHLB stock | 766 | 1,153 | 1,003
(Losses) gains on investment securities, net | (185) | 425 | 79
Other income | 1,039 | 908 | 937
Total non-interest income | 8,268 | 9,161 | 9,193
Non-interest expense |  |  |
Salaries and related benefits | 29,958 | 26,663 | 25,764
Occupancy and equipment | 5,472 | 5,081 | 5,498
Depreciation and amortization | 1,941 | 1,822 | 1,968
Federal Deposit Insurance Corporation insurance | 666 | 825 | 997
Data processing | 4,906 | 3,625 | 3,318
Professional services | 2,858 | 2,044 | 2,121
Directors' expense | 720 | 553 | 826
Information technology | 769 | 862 | 736
Provision for losses on off-balance sheet commitments | 57 | 150 | (263)
Other expense | 6,435 | 6,067 | 5,984
Total non-interest expense | 53,782 | 47,692 | 46,949
Income before provision for income taxes | 28,838 | 36,480 | 28,931
Provision for income taxes | 12,862 | 13,346 | 10,490
Net income | $ 15,976 | $ 23,134 | $ 18,441
Net income per common share: |  |  |
Basic (in dollars per share) | $ 2.58 | $ 3.81 | $ 3.09
Diluted (in dollars per share) | $ 2.55 | $ 3.78 | $ 3.04
Weighted average shares: |  |  |
Basic (in shares) | 6,196 | 6,073 | 5,966
Diluted (in shares) | 6,273 | 6,115 | 6,065
Dividends declared per common share (in dollars per share) | $ 1.12 | $ 1.02 | $ 0.90
Comprehensive income: |  |  |
Net income | $ 15,976 | $ 23,134 | $ 18,441
Other comprehensive income (loss): |  |  |
Change in net unrealized gain or loss on available-for-sale securities | 3,671 | (5,679) | (1,481)
Reclassification adjustment for losses (gains) on available-for-sale securities in net income | 185 | (394) | (6)
Net unrealized loss on securities transferred from available-for-sale to held-to-maturity | (3,036) | 0 | 0
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity | 426 | 21 | 61
Subtotal | 1,246 | (6,052) | (1,426)
Deferred tax expense (benefit) | 439 | (2,566) | (531)
Other comprehensive income (loss), net of tax | 807 | (3,486) | (895)
Comprehensive income | $ 16,783 | $ 19,648 | $ 17,546

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