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CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Interest income: |  |  |
Interest and fees on loans | $ 211,467 | $ 187,743 | $ 185,527
Interest and dividends on taxable investments | 56,201 | 52,871 | 50,247
Interest and dividends on nontaxable investments | 17,519 | 19,008 | 20,446
Total interest income | 285,187 | 259,622 | 256,220
Interest expense: |  |  |
Interest on deposits | 7,325 | 6,971 | 8,191
Interest on borrowings | 1,017 | 1,694 | 1,124
Interest on subordinated debt held by unconsolidated subsidiary trusts | 2,949 | 2,537 | 2,477
Total interest expense | 11,291 | 11,202 | 11,792
Net interest income | 273,896 | 248,420 | 244,428
Provision for loan losses | 8,076 | 6,447 | 7,178
Net interest income after provision for loan losses | 265,820 | 241,973 | 237,250
Noninterest income: |  |  |
Deposit service fees | 58,595 | 52,747 | 52,756
Other banking revenues | 7,477 | 4,960 | 5,814
Employee benefit services | 46,628 | 45,388 | 42,580
Insurance services | 23,149 | 3,352 | 1,450
Wealth management services | 19,776 | 16,856 | 16,420
Loss on sales of investment securities, net | 0 | (4) | 0
Total noninterest income | 155,625 | 123,299 | 119,020
Noninterest expenses: |  |  |
Salaries and employee benefits | 151,647 | 126,356 | 123,077
Occupancy and equipment | 30,078 | 27,593 | 27,948
Data processing and communications | 34,501 | 30,430 | 29,294
Amortization of intangible assets | 5,479 | 3,663 | 4,287
Legal and professional fees | 8,455 | 6,813 | 7,247
Office supplies and postage | 7,274 | 6,476 | 6,270
Business development and marketing | 7,484 | 7,204 | 7,125
FDIC insurance premiums | 3,671 | 3,962 | 3,899
Acquisition expenses | 1,706 | 7,037 | 123
Other expenses | 16,553 | 13,521 | 17,310
Total noninterest expenses | 266,848 | 233,055 | 226,580
Income before income taxes | 154,597 | 132,217 | 129,690
Income taxes | 50,785 | 40,987 | 38,337
Net income | $ 103,812 | $ 91,230 | $ 91,353
Basic earnings per share (in dollars per share) | $ 2.34 | $ 2.21 | $ 2.24
Diluted earnings per share (in dollars per share) | 2.32 | 2.19 | 2.22
Cash dividends declared per share (in dollars per share) | $ 1.26 | $ 1.22 | $ 1.16

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